3 out of 3
Ben, Jack and Emma passed counters to each other and ended with the same number of counters. How many did they start with?
2 out of 3
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: ×2 and -5. What do you think?
2 out of 3
Can you work out how to produce different shades of pink paint?
2 out of 3
Can you make sense of these three proofs of Pythagoras' Theorem?
2 out of 3
Explore the area of families of parallelograms and triangles. Can you find rules to work out the areas?
2 out of 3
In this game the winner is the first to complete a row of three. Are some squares easier to land on than others?
2 out of 3
When is $7^n + 3^n$ a multiple of 10? Can you prove the result by two different methods?
1 out of 3
I've made some cubes and some cubes with holes in. This challenge invites you to explore the difference in the number of small cubes I've used. Can you see any patterns?
1 out of 3
You'll need to work in a group for this problem. The idea is to decide, as a group, whether you agree or disagree with each statement.
2 out of 3
When Charlie asked his grandmother how old she is, he didn't get a straightforward reply! Can you work out how old she is?
