Search

Weekly Problem 10 - 2014
What is the sum of the first $2011$ digits when $20 \div 11$ is written as a decimal?

A square, regular pentagon and equilateral triangle share a vertex. What is the size of the other angle?

How many ways are there of completing the mini-sudoku?

The Tower of Hanoi is an ancient mathematical challenge.

When I fold a 0-20 number line, I end up with 'stacks' of numbers on top of each other. These challenges involve varying the length of the number line and investigating the 'stack totals'.