Place the numbers 1 to 6 in the circles so that each number is the difference between the two numbers just below it.

These caterpillars have 16 parts. What different shapes do they make if each part lies in the small squares of a 4 by 4 square?

Greg made excellent progress on this problem by working systematically.

Place six toy ladybirds into the box so that there are two ladybirds in every column and every row.

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

Katie had a pack of 20 cards numbered from 1 to 20. She arranged the cards into 6 unequal piles where each pile added to the same total. What was the total and how could this be done?

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

Use the 'double-3 down' dominoes to make a square so that each side has eight dots.