Problem
First name
Peter Cook
School
Durham Johnston
Country
Age
13
Email address
petersamuelcook@hotmail.com
Firstly, I took 11 from 144 & 220, so I could list the common factors of the numbers that didn't include the remainder. I got 133 and 209. Then I listed the common factors and found that the only commmon factors above 11 of these two numbers is 19 as 7x 19= 133 & 19x11 = 209. Therefore I came to the judgement that n= 19