Addition and subtraction

Mrs Morgan, the class's teacher, pinned numbers onto the backs of three children. Use the information to find out what the three numbers were.

Choose four different digits from 1-9 and put one in each box so that the resulting four two-digit numbers add to a total of 100.

Can you make square numbers by adding two prime numbers together?

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.