Problem
First name
Seth
School
British International School of Boston
Country
Age
10
Making a Difference
To solve the puzzle 'Making a Difference' I first thought about the numbers there were to subtract from. I arrived at the answer : 25, 27, 28, 57, 58, 52, 72, 75, 78, 82, 85, and 87. But, if you look at the number which is composed of just the two smallest numbers or the numbers which have 2 at the start, and check the combinations for the subtracted number, you will find that all combinations from that are negative. After that, you can just try all other combinations and you’re done!
The answers are:
57-28=29 58-27=31 82-75=7 82-57=15 85-72=13 85-27=58 75-28=47 72-58=14 78-52=26 78-25=53 87-52=35 87-25=62 .