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?

This activity is best done with a whole class or in a large group. Can you match the cards? What happens when you add pairs of the numbers together?

How would you create the largest possible two-digit even number from the digit I've given you and one of your choice?

This problem challenges you to find out how many odd numbers there are between pairs of numbers. Can you find a pair of numbers that has four odds between them?

Can you work out the domino pieces which would go in the middle in each case to complete the pattern of these eight sets of 3 dominoes?

Kimie and Sebastian were making sticks from interlocking cubes and lining them up. Can they make their lines the same length? Can they make any other lines?

Choose four of the numbers from 1 to 9 to put in the squares so that the differences between joined squares are odd.

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?

An activity centred around observations of dots and how we visualise number arrangement patterns.