{"product_id":"1pc-round-wooden-wall-clock-mathematical-formula-design-instructional-wall-clock-silent-clock-suitable-for-living-room-bedroo","title":"Silent mathematical wall clock with black background - ALGORA","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 1rem}\n.aa a{color:#185FA5;text-decoration:underline}\n.aa .aa-title{display:inline-block;border-bottom:2px solid #FAC775;padding-bottom:4px;font-size:16px;font-weight:600;margin:1.75rem 0 .5rem;letter-spacing:.3px;color:#1A1A1A}\n.aa .aa-badge{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;padding:3px 10px;border-radius:20px;margin:0 4px 4px 0;vertical-align:middle;font-family:Georgia,serif}\n.aa .aa-badge-or{background:#FAC775;color:#1A1A1A}\n.aa .aa-badge-brun{background:#5C3A1E;color:#FFF9E8}\n.aa .aa-badge-noir{background:#1A1A1A;color:#FAC775}\n.aa 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summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003e\u003cspan class=\"aa-badge aa-badge-noir\"\u003eLe Labo\u003c\/span\u003e \u003cspan class=\"aa-badge aa-badge-brun\"\u003eWall clock\u003c\/span\u003e To tell the time, you’ll first need to do a little calculation: the ALGORA \u003cstrong\u003emathematical wall clock\u003c\/strong\u003e replaces each number on the dial with an \u003cstrong\u003eoperation to solve\u003c\/strong\u003e. At the top, 6·2 indicates twelve o’clock; elsewhere, a \u003cstrong\u003esquare root\u003c\/strong\u003e, a proportion, or a small \u003cstrong\u003eequation\u003c\/strong\u003e replace the familiar hours. The expressions are written in \u003cstrong\u003ewhite chalk-style lettering\u003c\/strong\u003e on a deep \u003cstrong\u003eblack background\u003c\/strong\u003e, just like on a classroom chalkboard, and two white hands sweep across this scholarly dial. Powered by a \u003cstrong\u003esilent quartz movement\u003c\/strong\u003e, it stays quiet whether it’s night or during a meeting, with no ticking. The light wood back features a mounting notch for easy installation. Four \u003cstrong\u003ediameters\u003c\/strong\u003e are offered, from approximately 25 to 40 cm, to suit a study, a student's bedroom, a classroom, or a large living room wall. A clock that makes math lovers smile, intrigues visitors, and turns every glance at the time into a \u003cstrong\u003esmall mental math exercise\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003eThe four available diameters\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-vars\"\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: #1A1A1A;\"\u003eØ 25 CM\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eSize S – Ø 25 cm\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003e10 inches, approx. 24.7 cm: office, bedroom, small section of wall\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: #1A1A1A;\"\u003eØ 30 CM\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eSize M – Ø 30 cm\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003e12 inches, approx. 29.7 cm: the versatile format, kitchen or office\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: #1A1A1A;\"\u003eØ 35 CM\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eSize L – Ø 35 cm\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003e14 inches, approx. 34.7 cm: living room, meeting room\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: #1A1A1A;\"\u003eØ 40 CM\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eSize XL – Ø 40 cm\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003e16 inches, approx. 40.6 cm: large wall, classroom, distance reading\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cp\u003eThe dial, hands, and movement are identical across all four sizes: only the diameter changes. The larger the clock, the easier the operations are to read from a distance, an asset in a classroom or shared workspace.\u003c\/p\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n\n\u003ch3\u003eTelling time by calculating: the principle of the dial\u003c\/h3\u003e\n\n\u003cp\u003eOn a classic dial, each hour is indicated by a number from 1 to 12. ALGORA maintains exactly this logic, but each position is occupied by an \u003cstrong\u003eexpression whose result\u003c\/strong\u003e corresponds to the hour. At the top of the dial, 6·2 equals 12; √4 equals 2; the proportion 50\/2 = 100\/x is solved with x = 4; √49 equals 7; and the equation -8 = 2 - x is solved with x = 10. The other positions follow the same principle, using \u003cstrong\u003esquare roots\u003c\/strong\u003e, subtractions, or first and second-degree equations.\u003c\/p\u003e\n\n\u003cp\u003eThis type of dial is a cheeky tribute to \u003cstrong\u003emathematics education\u003c\/strong\u003e: it reminds us that familiar numbers can be written in a thousand ways. Incidentally, the time is very easy to read without solving the calculations, thanks to the position of the hands, exactly like on a standard clock. Solving the operations then becomes an \u003cstrong\u003eoptional game\u003c\/strong\u003e, which can be proposed to a child, a student, or a curious guest.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eWhy you will love it\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA dial that makes you think\u003c\/span\u003e\u003cspan class=\"ds\"\u003eEach hour is a small operation to solve: a mental math exercise every time you glance at it.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eSilent quartz movement\u003c\/span\u003e\u003cspan class=\"ds\"\u003eNo ticking: ideal for a bedroom, office, or meeting room.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eChalkboard aesthetic\u003c\/span\u003e\u003cspan class=\"ds\"\u003eWhite chalk-style writing on a black background: an elegant nod to the classroom.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eFour diameters\u003c\/span\u003e\u003cspan class=\"ds\"\u003eFrom approx. 25 to 40 cm, to fit every wall and every viewing distance.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eSimple installation\u003c\/span\u003e\u003cspan class=\"ds\"\u003eA hanging notch on the light wood back: one nail or screw is all it takes.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eOne AA battery\u003c\/span\u003e\u003cspan class=\"ds\"\u003eSimple operation, using a standard AA battery (not included).\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eWhen time becomes a puzzle\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\n\n\u003cp\u003eThere is something joyfully provocative about this clock. Where one expects a simple 12, one reads \u003cstrong\u003e6·2\u003c\/strong\u003e; where one expects a 7, a square root. Visitors stop, squint, calculate, and then smile. The black dial with white inscriptions immediately evokes the \u003cstrong\u003eschool chalkboard\u003c\/strong\u003e, chalk, and demonstrations throughout the lesson.\u003c\/p\u003e\n\n\u003cp\u003eYet, the object is not at all academic once hung: its sober, black-and-white graphic design fits into a contemporary office, a library, or a kitchen. ALGORA is the clock for those who love \u003cstrong\u003enumbers\u003c\/strong\u003e, riddles, and objects that tell a story. A discreet way to remember, every day, that mathematics can also be \u003cstrong\u003efun\u003c\/strong\u003e.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-steps\"\u003e\n\n\u003ch4\u003eInstalling your ALGORA clock\u003c\/h4\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e1\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eChoose the diameter\u003c\/strong\u003e suited to your wall and viewing distance: 25 or 30 cm for an office, 35 or 40 cm for a living room or classroom.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e2\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eInsert one AA battery\u003c\/strong\u003e (not included) into the quartz movement compartment on the back of the clock, ensuring correct polarity.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e3\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eSet the time\u003c\/strong\u003e using the movement’s adjustment knob, turning gently clockwise.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e4\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eHang the clock\u003c\/strong\u003e using the notch on the light wood back on a nail or screw suitable for your wall, then check that it is level.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eALGORA or chalkboard clock?\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-cmp\"\u003e\n\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCriteria\u003c\/th\u003e\n\n\u003cth\u003eALGORA (this clock)\u003c\/th\u003e\n\n\u003cth\u003eChalkboard clock with equations\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDial\u003c\/td\u003e\n\n\u003ctd\u003ePlain black background, operations in white chalk\u003c\/td\u003e\n\n\u003ctd\u003eBlack background covered in calculations, school board style\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eExpressions\u003c\/td\u003e\n\n\u003ctd\u003eMultiplications, roots, proportions, equations\u003c\/td\u003e\n\n\u003ctd\u003eFactorials, derivatives, determinants, sums, roots\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eLevel\u003c\/td\u003e\n\n\u003ctd\u003eMental math, middle and high school\u003c\/td\u003e\n\n\u003ctd\u003eMore advanced, high school and higher education\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eDiameters\u003c\/td\u003e\n\n\u003ctd\u003eApprox. 25, 30, 35 or 40 cm\u003c\/td\u003e\n\n\u003ctd\u003e30 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFrame\u003c\/td\u003e\n\n\u003ctd\u003eFrameless, light wood back\u003c\/td\u003e\n\n\u003ctd\u003eWith metal frame and acrylic glass, or frameless\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eMovement\u003c\/td\u003e\n\n\u003ctd\u003eSilent quartz, 1 AA battery\u003c\/td\u003e\n\n\u003ctd\u003eQuartz, battery not included\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cp\u003eLe Labo offers a second mathematical clock, with a chalkboard-style dial covered in more advanced formulas. To discover it along with our other timekeeping objects, visit our \u003ca href=\"\/collections\/temps-et-meteo\"\u003etime and weather objects\u003c\/a\u003e collection.\u003c\/p\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e the \u003cstrong\u003eAA battery is not included\u003c\/strong\u003e. The indicated diameters are rounded: according to the manufacturer’s comparative photo, they correspond approximately to 24.7 cm, 29.7 cm, 34.7 cm, and 40.6 cm. The supplier specifies \"bamboo and wood\" materials; the light wood back is visible in the photos.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e in a child’s bedroom or a classroom, hang the clock at eye level and pose a small challenge: find the result of each operation. It’s a fun way to review \u003cstrong\u003esquare roots\u003c\/strong\u003e, proportions, and equations without even noticing.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eTechnical characteristics\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\n\n\u003ctable\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eType\u003c\/td\u003e\n\n\u003ctd\u003eRound mathematical dial wall clock\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDial\u003c\/td\u003e\n\n\u003ctd\u003eBlack background, chalk-style white operations\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHands\u003c\/td\u003e\n\n\u003ctd\u003eWhite (hours, minutes)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDiameters\u003c\/td\u003e\n\n\u003ctd\u003e25, 30, 35 or 40 cm (10, 12, 14 or 16 inches)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMovement\u003c\/td\u003e\n\n\u003ctd\u003eSilent quartz\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePower supply\u003c\/td\u003e\n\n\u003ctd\u003e1 AA battery (not included)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBack\u003c\/td\u003e\n\n\u003ctd\u003eLight wood with hanging notch\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMaterials (supplier)\u003c\/td\u003e\n\n\u003ctd\u003eBamboo and wood\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMounting\u003c\/td\u003e\n\n\u003ctd\u003eWall-mounted, via notch\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eThickness\u003c\/td\u003e\n\n\u003ctd\u003eNot disclosed\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eWeight\u003c\/td\u003e\n\n\u003ctd\u003eNot disclosed\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-warn\"\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrecautions:\u003c\/strong\u003e keep the battery out of reach of children: if swallowed, consult a doctor immediately. Remove the battery if not in use for a long period and dispose of it at an appropriate collection point. Attach the clock to a support suitable for the wall type; avoid very humid rooms and direct sunlight, which could alter the dial and wood.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n\n\u003ch3\u003eA clever gift for math lovers\u003c\/h3\u003e\n\n\u003cp\u003eALGORA is the \u003cstrong\u003eideal gift for a math teacher\u003c\/strong\u003e, an engineer, a student, or a puzzle enthusiast. It marks the start of a school year, passing an exam, retirement, or moving into a first office.\u003c\/p\u003e\n\n\u003cp\u003eTo compose a gift around science, explore \u003ca href=\"\/collections\/objets-scientifiques\"\u003eLe Labo’s scientific objects\u003c\/a\u003e or our \u003ca href=\"\/collections\/casse-tetes-et-bureau\"\u003epuzzles and desk accessories\u003c\/a\u003e.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently asked questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow do I read the time on this mathematical clock?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe hands work exactly like on a classic clock: the short one indicates hours, the long one minutes. The only difference is the dial: each number from 1 to 12 is replaced by an \u003cstrong\u003eoperation\u003c\/strong\u003e whose result corresponds to the hour. At the top, 6·2 equals 12; √4 equals 2; √49 equals 7, and so on. You can therefore read the time \u003cstrong\u003ewithout calculating\u003c\/strong\u003e, simply by the position of the hands, just like on a blank dial. Solving the operations becomes an optional little game, which amuses adults and students alike and makes every glance at the time a little more \u003cstrong\u003estimulating\u003c\/strong\u003e.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eDoes the clock make noise?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eNo, or almost not. ALGORA is equipped with a \u003cstrong\u003esilent quartz movement\u003c\/strong\u003e, marketed by the manufacturer as \"super silent.\" Unlike classic ticking movements, the second hand, when present, or the mechanism do not produce a click audible at normal distance. This is an important asset for a \u003cstrong\u003ebedroom\u003c\/strong\u003e, office, library, or meeting room, where the regular sound of a clock can quickly become bothersome. In a perfectly quiet room, with your ear to the dial, a very faint sound from the motor may remain, but it remains imperceptible in daily life, including at night.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhich diameter should I choose?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe choice mainly depends on the \u003cstrong\u003eviewing distance\u003c\/strong\u003e and wall size. The \u003cstrong\u003e25 cm\u003c\/strong\u003e is suitable for an office, bedroom, or a small wall section, when you are less than two or three meters away. The \u003cstrong\u003e30 cm\u003c\/strong\u003e is the most versatile format, perfect for a kitchen or home office. The \u003cstrong\u003e35 cm\u003c\/strong\u003e is perfect for a living room or meeting room. Finally, the \u003cstrong\u003e40 cm\u003c\/strong\u003e is ideal for a large wall or classroom: the operations remain readable from afar, facilitating the calculation game. The exact dimensions, according to the manufacturer’s photo, are slightly different from the rounded values.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat battery is required and is it provided?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe clock runs on \u003cstrong\u003eone AA battery\u003c\/strong\u003e (LR6), a common format that is easy to find. It is \u003cstrong\u003enot included\u003c\/strong\u003e: remember to have one on hand before installation, especially if giving as a gift. The battery fits into the quartz movement compartment on the back of the clock, observing the indicated polarity. A good quality alkaline battery generally provides a long lifespan for this type of quartz movement, although we cannot provide an exact duration. When the clock starts to lose time or stops, simply replace the battery and reset the time using the knob.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow do I hang the clock on the wall?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe back of the clock, made of \u003cstrong\u003elight wood\u003c\/strong\u003e, has a \u003cstrong\u003ehanging notch\u003c\/strong\u003e intended for a nail or screw. Choose a fixture suitable for your wall: anchor and screw for drywall or hollow brick, nail or suitable hook for a solid wall. Position the clock at eye level to enjoy the dial’s operations, then ensure it is \u003cstrong\u003elevel\u003c\/strong\u003e using the top number (6·2) as a guide. Avoid very humid areas, such as above a shower, as well as direct sunlight. The hardware is not provided: a simple nail or screw is sufficient in most cases.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat is the difference from Le Labo’s other mathematical clock?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eLe Labo offers two distinct mathematical clocks. ALGORA features a \u003cstrong\u003eplain black background\u003c\/strong\u003e against which accessible \u003cstrong\u003emental math\u003c\/strong\u003e operations stand out: multiplications, square roots, proportions, and simple equations. It comes in \u003cstrong\u003efour diameters\u003c\/strong\u003e, from approx. 25 to 40 cm, with a light wood back. The other model features a \u003cstrong\u003eschool chalkboard-style dial\u003c\/strong\u003e entirely covered in calculations, with more advanced expressions (factorials, derivatives, determinants, sums); it measures 30 cm and is available with a metal frame and acrylic glass or without a frame. ALGORA is more graphic and accessible, while the other is more dense and scholarly.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eIs this clock suitable for a classroom?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eYes, it is one of its favorite uses. Its \u003cstrong\u003eblackboard-style\u003c\/strong\u003e dial naturally fits into a math room, and its operations offer a fun way to review \u003cstrong\u003emental math\u003c\/strong\u003e, square roots, and equations. For a classroom, we recommend the \u003cstrong\u003e40 cm\u003c\/strong\u003e diameter, or even 35 cm, so that students can read the expressions from the back of the room. The silent quartz movement prevents any distracting noise during lessons or exams. It also makes for a \u003cstrong\u003egift appreciated by teachers\u003c\/strong\u003e at the end of the school year, whether for the classroom or for their own desk.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Comment lire l’heure sur cette horloge mathématique ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Les aiguilles fonctionnent comme sur une horloge classique. Seul le cadran change : chaque chiffre de 1 à 12 est remplacé par une opération dont le résultat correspond à l’heure. En haut, 6·2 vaut 12 ; √4 vaut 2 ; √49 vaut 7. On peut donc lire l’heure sans calculer, grâce à la position des aiguilles, et résoudre les opérations devient un petit jeu facultatif.\"}}, {\"@type\": \"Question\", \"name\": \"L’horloge fait-elle du bruit ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Pratiquement pas. ALGORA est équipée d’un mouvement à quartz présenté comme très silencieux par le fabricant : pas de tic-tac audible à distance normale. C’est un vrai atout pour une chambre, un bureau ou une salle de réunion. Dans une pièce parfaitement calme, en collant l’oreille au cadran, un très léger bruit du moteur peut subsister, mais il reste imperceptible au quotidien.\"}}, {\"@type\": \"Question\", \"name\": \"Quel diamètre choisir ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Tout dépend de la distance de lecture et du mur. Le 25 cm convient à un bureau ou une chambre, le 30 cm est le format polyvalent pour une cuisine ou un bureau à domicile, le 35 cm s’impose dans un salon, et le 40 cm est idéal pour un grand mur ou une salle de classe, où les opérations restent lisibles de loin. Les dimensions exactes diffèrent légèrement des valeurs arrondies.\"}}, {\"@type\": \"Question\", \"name\": \"Quelle pile faut-il et est-elle fournie ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"L’horloge fonctionne avec une seule pile AA, un format courant. Elle n’est pas incluse : prévoyez-en une avant l’installation, surtout si vous l’offrez. Elle s’insère dans le logement du mouvement au dos, en respectant la polarité. Nous ne pouvons pas indiquer de durée d’autonomie précise. Lorsque l’horloge retarde ou s’arrête, remplacez la pile et réglez à nouveau l’heure.\"}}, {\"@type\": \"Question\", \"name\": \"Comment accrocher l’horloge au mur ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Le dos en bois clair comporte une encoche d’accroche prévue pour un clou ou une vis. Choisissez une fixation adaptée à votre mur, cheville et vis pour du placo, clou pour un mur plein. Placez l’horloge à hauteur des yeux et vérifiez qu’elle est droite en prenant le 6·2 du haut comme repère. La fixation n’est pas fournie ; évitez les pièces très humides.\"}}, {\"@type\": \"Question\", \"name\": \"Quelle différence avec l’autre horloge mathématique du Labo ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"ALGORA présente un fond noir uni et des opérations accessibles en calcul mental : multiplications, racines, proportions, équations simples. Elle existe en quatre diamètres, de 25 à 40 cm environ. L’autre horloge du Labo adopte un cadran façon tableau d’école couvert de calculs, avec des expressions plus avancées ; elle mesure 30 cm et existe avec cadre métal ou sans cadre.\"}}, {\"@type\": \"Question\", \"name\": \"Cette horloge convient-elle à une salle de classe ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Oui, c’est même l’un de ses usages favoris. Son cadran façon tableau noir s’intègre naturellement dans une salle de mathématiques, et ses opérations offrent un support ludique pour réviser le calcul mental. Nous recommandons le diamètre de 40 cm, voire 35 cm, pour une lecture depuis le fond de la classe. Son mouvement silencieux évite tout bruit pendant les cours.\"}}]}\u003c\/script\u003e\n","brand":"Atelier Atypique","offers":[{"title":"S","offer_id":54860809175363,"sku":"1005007407336393-Style 1-10 inch","price":43.0,"currency_code":"USD","in_stock":true},{"title":"M","offer_id":54860809142595,"sku":"1005007407336393-Style 1-12 inch","price":65.0,"currency_code":"USD","in_stock":true},{"title":"L","offer_id":54860809109827,"sku":"1005007407336393-Style 1-14 inch","price":86.0,"currency_code":"USD","in_stock":true},{"title":"XL","offer_id":54860809077059,"sku":"1005007407336393-Style 1-16 inch","price":108.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/Sa32bf33a5f94493ba4097166c1c6dec6d.webp?v=1791060582","url":"https:\/\/atelier-atypique.com\/products\/1pc-round-wooden-wall-clock-mathematical-formula-design-instructional-wall-clock-silent-clock-suitable-for-living-room-bedroo","provider":"Atelier Atypique","version":"1.0","type":"link"}