Mathematics questions This is a list of recently added questions about mathematics. Play mathematics quiz and see all the questions. Which of the writers was a mathematician?Lewis Carroll. Lewis Caroll, author of "Alice in Wonderland" completed his mathematical studies at Oxford University, was a lecturer at this University. He wrote about 250 scientific papers in mathematics, logic and cryptography. He was interested in mathematical puzzles and numerical games.Created by: Kinga Fabijańskavery hard 38% Rudyard KiplingRudyard Kipling2076Lewis CarrollLewis Carroll4055Karol DickensKarol Dickens3010John Ronald Reuel TolkienJohn Ronald Reuel Tolkien1516writers riddles » Who introduced the Fibonacci numbers?Leonardo of Pisa, also known as Leonardo Fibonacci, Leonardo Pisano Bigollo. His 1202 book Liber Abaci introduced the sequence to Western European mathematics, although the sequence had been described earlier as Virahanka numbers in Indian mathematics.Created by: Olavery hard 26% Edouard LucasEdouard Lucas59CartesiusCartesius149Gottfried Wilhelm LeibnizGottfried Wilhelm Leibniz211Leonardo of PisaLeonardo of Pisa153history riddles » Which numeral system was in use in ancient Sumer and Babilon?Sexagesimal. Remnants of highly composite sexagesimal system are in use even today for measuring angles, geographic coordinates and especially time. An hour of time is divided into 60 minutes, which in turn are divided into 60 seconds. Created by: smyruvery hard 32% octaloctal2106binarybinary1919decimaldecimal2503sexagesimalsexagesimal3175numbers riddles » Which of the following is true for the solution with the pH=0?The OH − ion concentration is smaller than the H+ ion concentration. In chemistry, pH is a numeric scale used to specify the acidity or alkalinity of an aqueous solution. It is the negative of the logarithm to base 10 of the activity of the hydrogen ion .Traditionally the pH is being defined as: pH = - log10 [H+], where [H+] it is a H+ ions concentration in mol/dm^3 (M). So if pH = 0 this H+ ions concentration is 1 mol/dm^3 and the solution is strongly acidic.Created by: Paweł Kołodziejczykvery hard 25% the OH − ion concentration is smaller than the H+ ion concentrationthe OH − ion concentration is smaller than the H+ ion concentration604the OH − ion concentration is greater than the H+ ion concentrationthe OH − ion concentration is greater than the H+ ion concentration483the OH − ion concentration is equal of the H+ ion concentrationthe OH − ion concentration is equal of the H+ ion concentration641Such solution doesn't existSuch solution doesn't exist620chemistry riddles » How many degrees an obtuse angle can have ?90-180. The obtuse angle may measure from 90 to 180 degrees. Angles having a degree of 0 to 90 are acute angles, whereas those from 180 to 360 - concave angles.Created by: TotalBellendeasy 77% 0-3600-36031290-18090-18061270-900-90209180-360180-3601289geometry riddles » What is the volume of a soap bubble with radius R=1 cm?4/3π cm3. Equation for the volume of a sphere: 4/3πR^3.Created by: Paweł Kołodziejczykhard 58% 3/4π cm33/4π cm317464/3π cm34/3π cm351514,3π cm34,3π cm3923It isn't possible to calculateIt isn't possible to calculate1039numbers riddles » What is the result of 2+2*2?6. The multiplication has a priority over addition, and so the result is 2+(2*2) = 2+4 = 6.Created by: Paweł Kołodziejczykvery easy 83% 44131881105667319Not enough dataNot enough data205numbers riddles » Which of the following numbers is the greatest?1/3. Quite surprisingly, most players answer that both answers 1/3 and 33% are correct. But 1/3 is more than 33%. (it is 33.3333333...)Created by: globalquiz.orghard 54% 1/31/368090,30,355733%33%1204Both answers 1/3 and 33% are correctBoth answers 1/3 and 33% are correct3926numbers riddles » Which famous scientist was born on the Pi day? (March 14)Albert Einstein. 14 of March is celebrated on many schools and universities as both Pi Day and the birthday of Albert Einstein. On of the traditions is the 'Pi Pie' (pictured).Created by: globalquiz.orghard 48% Albert EinsteinAlbert Einstein4749Blaise PascalBlaise Pascal1657Isaac NewtonIsaac Newton1643all of the aboveall of the above1650scientists riddles » Which of the following is a prime number?16769023. A prime number has no positive divisors other than 1 and itself. Hence, a prime bigger than 2 cannot be even. All prime numbers bigger than 5, written in the usual decimal system, end in 1, 3, 7, or 9. Created by: Sumit Tamangaverage 66% 23882990238829901128167690231676902384213837729638377296107811723835117238351976math riddles » Play mathematics quiz and see all the questions.