Factors and Multiples game for an adult and child. How can you make sure you win this game?
Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.
A game in which players take it in turns to choose a number. Can you block your opponent?
The flow chart requires two numbers, M and N. Select several values for M and try to establish what the flow chart does.
How many of the numbers 1 to 20 are not the sum of two primes?
A country has decided to have just two different coins. Which totals can be made? Is there a largest total that cannot be made? How do you know?
Follow this recipe for sieving numbers and see what interesting patterns emerge.
Great Granddad is very proud of his telegram from the Queen congratulating him on his hundredth birthday and he has friends who are even older than he is... When was he born?
Can you work out what step size to take to ensure you visit all the dots on the circle?
