24. 2 + 2 + 2 + 2 3 + 3 + 3 + 3

2 + 2 + 2 + 2 = 8

3 + 3 + 3 + 3 = 12

12 - 3 - 3 - 3 - 3 = 0

12 - 4 - 4 - 4 = 0