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Weekly Problem 21 - 2010
How many diagonals can you draw on this square...

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

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

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

Which of the following shaded regions has an area different from the other shaded regions?

I am standing behind five pupils who are signalling a five-digit number to someone on the opposite side of the playground. What number is actually being signalled?

10 must remain within easy reach...

Weekly Problem 11 - 2013
A shop has "Everything half price", and then "15% off sale prices". What is the overall reduction in cost?

If this class contains between $45$% and $50$% girls, what is the smallest possible number of girls in the class?