Solution

26151

Problem
Three neighbours Back to problem
First name
Hannah, Sam & Gloria
School
Abington High School
Country
England
Age
13

When you add three consecutive numbers together the answer is always divisible by 3. Name the first number a, then the next number is a+1 and the next number is a+2. Add these together and you get a+a+1+a+2=3a+3 or 3(a+1) which is divisible by 3.