Prime numbers

game
Favourite

Dicey Array

Age

5 to 11

Challenge level

1 out of 3

Watch the video of this game being played. Can you work out the rules? Which dice totals are good to get, and why?
problem
Favourite

Statement Snap

Age

7 to 11

Challenge level

1 out of 3

You'll need to know your number properties to win a game of Statement Snap...
problem
Favourite

Round and Round the Circle

Age

7 to 11

Challenge level

2 out of 3

What happens if you join every second point on this circle? How about every third point? Try with different steps and see if you can predict what will happen.
problem
Favourite

Two Primes Make One Square

Age

7 to 11

Challenge level

2 out of 3

Can you make square numbers by adding two prime numbers together?
problem
Favourite

Factor Lines

Age

7 to 14

Challenge level

2 out of 3

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

Factors and Multiples Game

Age

7 to 16

Challenge level

1 out of 3

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

Xavi's T-Shirt

Age

7 to 16

Challenge level

1 out of 3

How much can you read into a T-shirt?
problem
Favourite

How Much Can We Spend?

Age

11 to 14

Challenge level

1 out of 3

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?
problem
Favourite

Sieve of Eratosthenes

Age

11 to 14

Challenge level

1 out of 3

Follow this recipe for sieving numbers and see what interesting patterns emerge.
problem
Favourite

Stars

Age

11 to 14

Challenge level

2 out of 3

Can you work out what step size to take to ensure you visit all the dots on the circle?