Exploring and noticing

problem
Favourite

Summing Consecutive Numbers

Age

11 to 14

Challenge level

1 out of 3

15 = 7 + 8 and 10 = 1 + 2 + 3 + 4. Can you say which numbers can be expressed as the sum of two or more consecutive integers?
problem
Favourite

Magic Letters

Age

11 to 14

Challenge level

1 out of 3

Charlie has made a Magic V. Can you use his example to make some more? And how about Magic Ls, Ns and Ws?
problem
Favourite

Fence It

Age

11 to 14

Challenge level

1 out of 3

If you have only 40 metres of fencing available, what is the maximum area of land you can fence off?
problem
Favourite

Strange Bank Account

Age

11 to 14

Challenge level

1 out of 3

Imagine a very strange bank account where you are only allowed to do two things...
game
Favourite

Up, Down, Flying Around

Age

11 to 14

Challenge level

1 out of 3

Play this game to learn about adding and subtracting positive and negative numbers
problem
Favourite

Add to 200

Age

11 to 14

Challenge level

1 out of 3

By selecting digits for an addition grid, what targets can you make?
problem
Favourite

Forwards Add Backwards

Age

11 to 14

Challenge level

1 out of 3

What happens when you add a three digit number to its reverse?
problem
Favourite

About Average

Age

11 to 14

Challenge level

1 out of 3

Can you find sets of numbers which satisfy each of our mean, median, mode and range conditions?
problem
Favourite

Half a Minute

Age

11 to 14

Challenge level

1 out of 3

Anna, Ben and Charlie have been estimating 30 seconds. Who is the best?
problem
Favourite

Beach Huts

Age

11 to 14

Challenge level

1 out of 3

Can you figure out how sequences of beach huts are generated?