You may also like

problem icon

Where Can We Visit?

Charlie and Abi put a counter on 42. They wondered if they could visit all the other numbers on their 1-100 board, moving the counter using just these two operations: x2 and -5. What do you think?

problem icon

Arithmagons

Can you find the values at the vertices when you know the values on the edges?

problem icon

Gr8 Coach

Can you coach your rowing eight to win?

In the Bag

Stage: 3 Challenge Level: Challenge Level:1

The sets of 10 marbles are chosen randomly, so could contain:
4 red, 3 green, 2 blue and 1 yellow or
4 red, 3 green and 3 yellow or
7 red and 3 blue or...

A run of 10 viewings may produce an outcome that is not representative of the actual contents of the bag.