# Mathematics questions

This is a list of recently added questions about mathematics. Play mathematics quiz and see all the questions.## 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,[6] although the sequence had been described earlier as Virahanka numbers in Indian mathematics.

Created by: Ola

very hard

24%

Edouard Lucas

Edouard Lucas

40

Cartesius

Cartesius

120

Gottfried Wilhelm Leibniz

Gottfried Wilhelm Leibniz

158

Leonardo of Pisa

Leonardo of Pisa

104

## 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: smyru

very hard

32%

octal

octal

2040

binary

binary

1848

decimal

decimal

2431

sexagesimal

sexagesimal

3036

## 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 Kołodziejczyk

very hard

25%

the OH − ion concentration is smaller than the H+ ion concentration

the OH − ion concentration is smaller than the H+ ion concentration

564

the OH − ion concentration is greater than the H+ ion concentration

the OH − ion concentration is greater than the H+ ion concentration

436

the OH − ion concentration is equal of the H+ ion concentration

the OH − ion concentration is equal of the H+ ion concentration

593

Such solution doesn't exist

Such solution doesn't exist

583

## 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: TotalBellend

easy

77%

0-360

0-360

285

90-180

90-180

5640

0-90

0-90

188

180-360

180-360

1202

## 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.org

hard

53%

1/3

1/3

6119

0,3

0,3

506

33%

33%

1095

Both answers 1/3 and 33% are correct

Both answers 1/3 and 33% are correct

3665

## 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.org

hard

48%

Albert Einstein

Albert Einstein

4432

Blaise Pascal

Blaise Pascal

1576

Isaac Newton

Isaac Newton

1560

all of the above

all of the above

1573

## 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 Tamang

average

66%

23882990

23882990

1060

16769023

16769023

7839

38377296

38377296

1006

11723835

11723835

1857

## How many possible code combinations are there for this kind of lock?

10000. The possible codes are from 0000 to 9999 inclusive. There are 10 possibilities for each ring, thus there are 10*10*10*10 possible codes.

Created by: Teddy

hard

51%

999

999

489

1000

1000

653

9999

9999

3537

10000

10000

5008

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