Addition and subtraction

Tim had nine cards each with a different number from 1 to 9 on it. How could he have put them into three piles so that the total in each pile was 15?

Have a go at this game which involves throwing two dice and adding their totals. Where should you place your counters to be more likely to win?

A group of children are using measuring cylinders but they lose the labels. Can you help relabel them?

Investigate the different numbers of people and rats there could have been if you know how many legs there are altogether!

Use your logical thinking skills to deduce how much Dan's crisps and ice cream cost altogether.

This challenge combines addition, multiplication, perseverance and even proof.

This task combines spatial awareness with addition and multiplication.

Try out this number trick. What happens with different starting numbers? What do you notice?

Use 4 four times in a calculation. What answers can you get?

How could you arrange at least two dice in a stack so that the total of the visible spots is 18?