1 out of 3
Sequences of multiples keep cropping up...
2 out of 3
Construct two equilateral triangles on a straight line. There are two lengths that look the same - can you prove it?
2 out of 3
How did the the rotation robot make these patterns?
2 out of 3
How many winning lines can you make in a three-dimensional version of noughts and crosses?
2 out of 3
Caroline and James pick sets of five numbers. Charlie tries to find three that add together to make a multiple of three. Can they stop him?
2 out of 3
If you can copy a network without lifting your pen off the paper and without drawing any line twice, then it is traversable. Decide which of these diagrams are traversable.
2 out of 3
The clues for this Sudoku are the product of the numbers in adjacent squares.
2 out of 3
Can you find and prove the relationship between the area of a trapezium and the area of a triangle constructed within it?
2 out of 3
Can you make sense of these three proofs of Pythagoras' Theorem?
3 out of 3
The items in the shopping basket add and multiply to give the same amount. What could their prices be?
