Construct two equilateral triangles on a straight line. There are two lengths that look the same - can you prove it?
Using the digits 1 to 9, the number 4396 can be written as the product of two numbers. Can you find the factors?
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?
The clues for this Sudoku are the product of the numbers in adjacent squares.
It would be nice to have a strategy for disentangling any tangled ropes...
Can you do a little mathematical detective work to figure out which number has been wiped out?
Can you use small coloured cubes to make a 3 by 3 by 3 cube so that each face of the bigger cube contains one of each colour?
The items in the shopping basket add and multiply to give the same amount. What could their prices be?
Can you find a strategy that ensures you get to take the last biscuit in this game?
Here is a machine with four coloured lights. Can you make two lights switch on at once? Three lights? All four lights?
