Problem
First name
Kayleigh Stone
School
Martin Wilson
Country
Age
10
Email address
mrscubbin@hotmail.com
First of all I knew that 1 was needed to make the number 1. Next I knew that 2 was needed, so 1 and 2 could make 3p, therefore I knew I didn't need a 3p bag. Next I went to number 4. Six and seven are skipped because 4 + 2 = 6 and 1 + 2 + 4 = 7 so therefore I knew that the next number is 8. Then all numbers from 1-15 can be made with numbers 1, 2, 4 and 8.
1p = 1p
2p = 2p
3p = 1p + 2p
4p = 4p
5p = 1p + 4p
6p = 2p + 4p
7p = 1p + 2p + 4p
8p = 8p
9p = 1p + 8p
10p = 2p + 8p
11p = 1p + 2p + 8p
12p = 4p + 8p
13p = 1p + 4p + 8p
14p = 2p + 4p + 8p
15p = 1p + 2p + 4p + 8p