A task which depends on members of the group noticing the needs of others and responding.

Sweets are given out to party-goers in a particular way. Investigate the total number of sweets received by people sitting in different positions.

How quickly can you put back the numbers on the hundred square? What's the smartest way to do it?

What happens when you round these three-digit numbers to the nearest 100?

Each child in Class 3 took four numbers out of the bag. Who had made the highest even number?

Place the numbers from 1 to 9 in the squares below so that the difference between joined squares is odd. How many different ways can you do this?

Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?

Who said that adding, subtracting, multiplying and dividing couldn't be fun?

What happens when you add three numbers together? Will your answer be odd or even? How do you know?

You have two sets of the digits 0 – 9. Can you arrange these in the five boxes to make four-digit numbers as close to the target numbers as possible?

This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?

There are six numbers written in five different scripts. Can you sort out which is which?

This activity involves rounding four-digit numbers to the nearest thousand.

Find out what a Deca Tree is and then work out how many leaves there will be after the woodcutter has cut off a trunk, a branch, a twig and a leaf.

Four strategy dice games to consolidate pupils' understanding of rounding.

There are nasty versions of this dice game but we'll start with the nice ones...

Some of the numbers have fallen off Becky's number line. Can you figure out what they were?

Who said that adding, subtracting, multiplying and dividing couldn't be fun?