In this activity, we will add together pairs of square numbers from the list:

1,  4,  9,  16,  25,  36,  49,  64,  81,  100

Example
How many different totals of two numbers can we find from the list :   1,  4,  9

Answer 

Different totals that can be formed are:

1 + 4 = 5

1 + 9 = 10

4 + 9 = 13

That look fairly straightforward, doesn't it?

Let's have a go!