How would you find out how many football cards Catrina has collected?

Kimie and Sebastian were lining up sticks of lengths two and three. What lengths could they make their lines?

Can you work out how to make each side of this balance equally balanced? You can put more than one weight on a hook.

If you count from 1 to 20 and clap more loudly on the numbers in the two times table, as well as saying those numbers loudly, which numbers will be loud?

You have a set of the digits from 0 to 9. Can you arrange these in the five boxes to make two-digit numbers as close to the targets as possible?

This group activity is all about representing and adding odd and even numbers.

Mr Gilderdale is playing a game with his class. What rule might he have chosen? How would you test your idea?

Which special types of numbers will you make with these tens and ones spinners?

Daisy and Akram have made some number patterns. Can you find out which pattern is longer?

What happens when you add two odd numbers together?

Throw the dice and decide whether to double or halve the number. Will you be the first to reach the target?

It's Sahila's birthday and she is having a party. How could you answer these questions using a picture, with things, with numbers or symbols?

How will you work out which numbers have been used to create this multiplication square?

Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?

Yasmin and Zach have some bears to share. Which numbers of bears can they share so that there are none left over?

How many trains can you make which are the same length as Matt's and Katie's, using rods that are identical?

An old game with lots of arithmetic!

Help share out the biscuits the children have made.

Which numbers can you put into pairs that add to 10? Which ones do you have to leave out?

In this calculation, the box represents a missing digit. What could the digit be?

This activity focuses on doubling multiples of five.

What do you see as you watch this video? Can you create a similar video for the number 12?

On Friday the magic plant was only 2 centimetres tall. Every day it doubled its height. How tall was it on Monday?

Arrange the numbers 1 to 6 so that the sum of each side of the triangle equals the number in its centre.

Pat counts her sweets in different groups and both times she has some left over. How many sweets could she have had?

On a farm there were some animals with 8 heads and 22 feet altogether. How many hens were there?

Frances and Rishi were given a bag of lollies. They shared them out evenly and had one left over. How many lollies could there have been in the bag?

Choose four numbers to put in the squares so that the differences between joined squares are odd.

The Man is much smaller than us. Can you use the picture of him next to a mug to estimate his height and how much tea he drinks?

Ahmed is making rods using different numbers of cubes. Which rod is twice the length of his first rod?

Annie and Ben are playing a game with a calculator. What was Annie's secret number?

Which numbers make these lights come on? Do any numbers light up all the lights?

How many legs do each of these creatures have? How many pairs is that?

Can you work out how many flowers there will be on this plant after six weeks?

Tom had a tomato plant and he sowed a bean seed. When will the two plants be the same height?

Use the information about Sally and her brother to find out how many children there are in the Brown family.

If there are 3 squares in the ring, can you place three different numbers in them so that their differences are odd? Try with different numbers of squares around the ring. What do you notice?

Find a great variety of ways of asking questions which make 8.

Follow the clues to find the mystery number.

In how many different ways can you break up a stick of seven interlocking cubes? Now try with a stick of eight cubes and a stick of six cubes. What do you notice?

"Ip dip sky blue! Who's 'it'? It's you!" Where would you position yourself to be chosen?

How would you create the largest possible two-digit even number using the digit you're given?

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

This investigation involving the four operations looks at doing and undoing.

Are these statements relating to odd and even numbers always, sometimes or never true?

Use the interactivities to fill in these Carroll diagrams. How do you know where to place the numbers?

Here is a picnic that Petros and Michael are going to share equally. Can you tell us what each of them will have?

What could each of the children buy in the sweet shop?

Four bags contain 1s, 3s, 5s and 7s. Can you pick ten numbers from the bags so that their total is 37?

Ben and his mum are planting garlic. Can you find out how many cloves of garlic they might have had?