Mathematics Facts & Trivia - Page 2

Googol 1 googol = 10100 1 googolplex = 10googol = 1010100 (The "Google" website name was inspired by "Googol".)
1111 111 111 111 × 111 111 111 = 12345678 9 87654321
PiPi (3.14159...) is a number that cannot be written as a fraction. Submitted by: Tiff - Witherbee, United States
Dice cubeThe opposite sides of a dice cube always add up to seven. Submitted by: Ramesh - Pune, India
21978 8791221978 when multiplied by 4 is the same number with digits in reverse order: 21978 × 4 = 87912
If you add up the numbers 1-100 consecutively (1+2+3+4+5...) the total is 5050.
PiThe billionth digit of Pi is 9.
1 and 2 are the only numbers where they are the values of the numbers of factors they have.
2 and 5 are the only prime numbers that end in 2 or 5.
The largest known prime number (so far) is 17,425,170 digits long. Submitted by: Mathguy
PiThe digits to the right of the Pi's (3.141...) decimal point can keep going forever, and there is no pattern to these digits at all.