1. the smallest ten prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23 and 29.

2. 2 and 5 are the only prime numbers that end with a 2 or a 5.

3. the numeric digits we use today originate from the Hindu-Arabic number system and were developed over 10000 years ago.

4. the number pi cannot be expressed as a fraction and is therefore an irrational number. The digits after the decimal point never repeat and are infinite.

5. the number Pi with 100 decimal places: 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679

6. what comes after millions, billions and quadrillions: Trillions, quadrillions, quadrillions, quintillions, quintillions, sextillions, sextillions, septillions, septillions, octillions, octillions....

The name of the search engine Google comes from the word Googol, which is the number ten to the hundred.

8. 12 + 3 – 4 + 5 + 67 + 8 + 9 = 100

9. 111111111 x 111111111 = 12345678987654321

10th Fibonacci numbers were named after the Italian mathematician Leonardo of Pisa (better known as Fibonacci), who introduced them to Western Europe. They run as follows: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811,... The next number consists of the addition of the two previous numbers.