To find the missing number in the sequence 72, 68, 64, 60, 56, 52, we can look at the pattern of the numbers provided.
The sequence is decreasing by 4 each time:
- 72 - 4 = 68
- 68 - 4 = 64
- 64 - 4 = 60
- 60 - 4 = 56
- 56 - 4 = 52
Following this pattern, the number before 72 can be calculated as:
- 72 + 4 = 76
Therefore, the missing number in the sequence is 76.