For this problem, you need to work backwards. So, at the end of the second game, one person has $16, and the other two have $4. After the first game, the person with $16 had $8, another person has $2, and the last has $14. Then, before the first game, the person with $8 had $4, the person with $14 had $7, and the person with $2 had $13. You can check your answer from there.