Geekery

Riddles: The Really, Really, Really Big Number

Posted on 16. Sep, 2009 by Jake in brain teasers

The Really, Really, Really Big Number

When you divide 12 by 5, the remainder is 2; it’s what’s left over after you have removed all the 5s from the 12.  When you raise 4 to the fifth power (that is, 45), you multiply four by itself five times: 4×4×4×4×4, which equals 1,024.

What is the remainder when you divide 100100 by 11?

The Unkindest Cut of All, Part 1 of 2

The area of a square is equal to the square of the length of one side. So, for example, a square with side length 3 has area (32), or 9. What is the area of a square whose diagonal is length 5?

Answers will be published on Tuesday the 29th of September

Tags: brain teaser, frontal lobes, geekery, geometry, maths, maths puzzles, riddles, spatial reasoning