Mathematics Facts & Trivia - Page 2

21978 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. Sciensational.com

The billionth digit of Pi is 9. Sciensational.com

1 and 2 are the only numbers where they are the values of the numbers of factors they have. Sciensational.com

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

The largest known prime number (so far) is 12,978,189 digits long. Sciensational.comSubmitted by: Mathguy

The 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.