Tag Archives: maths


  1. Take any four-digit number, using at least two different digits. (Leading zeros are allowed.)
  2. Arrange the digits in ascending and then in descending order to get two four-digit numbers, adding leading zeros if necessary.
  3. Subtract the smaller number from the bigger number.
  4. Go back to step 2.

via 6174 (number) – Wikipedia, the free encyclopedia.

More reading available here.


Do math, become unstoppable.

All the hottest buttons are on this guy – you got SIN, COS, TAN. Heck, there’s even a button that just says MATH. What does it do?! I thought all of these buttons did that. Looks like you have quite an adventure ahead of you as you unlock the secrets of MATH, LOG, x-1, ALPHA, LN, and more. And for those of you old-school guys looking to do some of that classic math – we’ve got all your favorites – +, -, X and much more!