Solution

155036

Problem / game
First name
Kate Griffin
School
Newton Prep
Age
11
Email address
juliazag@aol.com

I started off by cutting out the different squares so I could move them around freely. Then I looked at which numbers went into which. For example, 15 would be: 7+8
I rearranged for a while but eventually got the picture attached.

It looks like a square - but it's actually a rectangle! One of the sides measures 32 and the other 33.