7. 24 22 19 15 _ _

The differences between consecutive numbers are:
24 - 22 = 2
22 - 19 = 3
19 - 15 = 4
The differences are increasing by 1.
The next differences should be 5 and 6.
15 - 5 = 10
10 - 6 = 4

Answer: 10 4