Solution

158980

Problem / game
First name
Teyonne, Amy, Rika
School
Riverina
Country
Age
0

We worked in a mixed age group, 8, 10 and 11 years old. The smallest number was eight and the biggest number we could make was fourteen. We found we could only make fourteen once and eight twice. So we estimated that it was between nine and thirteen. So we started to lower it down and tested each number.