Solution

156514

Problem / game
Number Detective Back to problem
First name
Phoenix
School
Mayfield CE Primary School
Country
United Kingdom, UK
Age
10

The answer is 64. This is because 120 and 8 are not two-didgit numbers; 1 isn't bigger than 8, 4 isn't bigger than 6 and 2 and 2 are the same. I like this problem. Please make more of these. 10/10!