2 out of 3
A square is divided into four rectangles and a square. Can you work out the ratio of the side lengths of the rectangles?
2 out of 3
Weekly Problem 30 - 2011
Three touching circles have an interesting area between them...
3 out of 3
Grandpa made a super-heavy rock cake. Five people have guessed the weight of the cake. Can you work out the weight of his cake?
2 out of 3
Two of the triangles in the diagram are shaded black. What is the probability the resulting figure has at least one line of symmetry?
3 out of 3
What is the last non-zero digit of $2^{57} \times 3^4 \times 5^{53}$?
1 out of 3
Weekly Problem 21 - 2016
Peter Piper picked a peck of pickled peppers. How many more pecks must Peter Piper pick to fill a barrel?
1 out of 3
Weekly Problem 32 - 2015
Can you work out the missing numbers in this multiplication magic square?
1 out of 3
Nicola has lost a piece of her 3D jigsaw. Can you work out the shape of the missing piece?
1 out of 3
What shape would fit your pens and pencils best? How can you make it?
