These activities are part of our Primary collections, which are problems grouped by topic.

Number differences

Count me in
How do you know whether you will reach these numbers when you count in steps of six from zero?

Swimming pool
In this problem, we're investigating the number of steps we would climb up or down to get out of or into the swimming pool. How could you number the steps below the water?

First connect three

Tug harder!

Space distances

Sea level
The picture shows a lighthouse and some underwater creatures. Can you work out the distances between some of the different creatures?

Roman numerals

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

Representing numbers

Four-digit targets

Satisfying four statements

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

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

Less is more

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

Planning a school trip

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

The remainders game
Play this game and see if you can figure out the computer's chosen number.

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

Round the four dice

The Deca Tree
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.

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

A mixed-up clock
There is a clock-face where the numbers have become all mixed up. Can you find out where all the numbers have got to from these ten statements?

Reasoned rounding

What distance?
Can you use addition and subtraction to answer these questions about real-life distances?


Number lines in disguise
