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

Three children are going to buy some plants for their birthdays. They will plant them within circular paths. How could they do this?

These eleven shapes each stand for a different number. Can you use the multiplication sums to work out what they are?

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.

Can you go through this maze so that the numbers you pass add to exactly 100?

This dice train has been made using specific rules. How many different trains can you make?

Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.

Take turns to place a decimal number on the spiral. Can you get three consecutive numbers?

This challenge extends the Plants investigation so now four or more children are involved.

A game in which players take it in turns to choose a number. Can you block your opponent?

How many solutions can you find to this sum? Each of the different letters stands for a different number.