Try entering different sets of numbers in the number pyramids. How does the total at the top change?
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?
Charlie has made a Magic V. Can you use his example to make some more? And how about Magic Ls, Ns and Ws?
Imagine a very strange bank account where you are only allowed to do two things...
Play this game to learn about adding and subtracting positive and negative numbers
Can you find six numbers to go in the daisy from which you can make all the numbers from 1 to a number bigger than 25?
By selecting digits for an addition grid, what targets can you make?
What happens when you add a three digit number to its reverse?
How many different differences can you make?
