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 37% Rudyard KiplingRudyard Kipling2520Lewis CarrollLewis Carroll4842Karol DickensKarol Dickens3843John Ronald Reuel TolkienJohn Ronald Reuel Tolkien1795writers 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 37% Edouard LucasEdouard Lucas167CartesiusCartesius413Gottfried Wilhelm LeibnizGottfried Wilhelm Leibniz422Leonardo of PisaLeonardo of Pisa602history 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 31% octaloctal2738binarybinary2397decimaldecimal3004sexagesimalsexagesimal3800numbers 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 concentration750the OH − ion concentration is greater than the H+ ion concentrationthe OH − ion concentration is greater than the H+ ion concentration592the OH − ion concentration is equal of the H+ ion concentrationthe OH − ion concentration is equal of the H+ ion concentration820Such solution doesn't existSuch solution doesn't exist786chemistry 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% 0-3600-36035290-18090-18083710-900-90260180-360180-3601788geometry 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 59% 3/4π cm33/4π cm324724/3π cm34/3π cm375874,3π cm34,3π cm31206It isn't possible to calculateIt isn't possible to calculate1582numbers 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 86% 441518812746610456Not enough dataNot enough data241numbers 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 53% 1/31/396700,30,374633%33%1564Both answers 1/3 and 33% are correctBoth answers 1/3 and 33% are correct6157numbers 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 46% Albert EinsteinAlbert Einstein5567Blaise PascalBlaise Pascal2170Isaac NewtonIsaac Newton2014all of the aboveall of the above2101scientists 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 67% 238829902388299014911676902316769023109973837729638377296141211723835117238352485math riddles » Play mathematics quiz and see all the questions.