Solution

26626

Problem
Square subtraction Back to problem
First name
Rosalyn Dolman
School
St.Mary's Chorley
Country
England
Age
10

If you take an odd number, square it and take away the odd number you are left with an even number. If you take an even number, square it and take away the even number you are also left with an even number. This shows if you take a number, square it and take away the number you are ALWAYS left with an even number.