Solution

39158

Problem
Sticky Triangles Back to problem
First name
Jodie Bennett
School
Brookfield Junior School
Country
England
Age
11

First I found five different patterns. After that, I noticed a pattern that all the numbers of triangles were square numbers. Once I did that, I worked out that I needed to square all of the pattern numbers. e.g. 4th pattern number would be 4x4 so there were 16 triangles.