Some stickers are in a packet.
If Adam puts them into groups of 7, there are 4 stickers left.
If Adam puts them into groups of 9, there are 4 stickers left.
Find the smallest possible number of stickers in a packet.
Multiples of 7: 7, 14, 21, 28, 35, 42, 49, 56, 63
Multiples of 7 (+4): 11, 18, 25, 32, 39, 46, 53, 60, 67
Multiples of 9: 9, 18, 27, 36, 45, 54, 63
Multiples of 9 (+4): 13, 22, 31, 40, 49, 58, 67
Smallest possible number of stickers in a packet = 67
Answer(s): 67