Step-by-step Solution:

Pattern Analysis

The pattern is found by looking at the differences between consecutive numbers in the series:

• 99 - 9 = 90


• 90 - 7 = 83


• 83 - 5 = 78

The amount being subtracted is a sequence of decreasing odd numbers (9, 7, 5). The value of the subtraction decreases by 2 at each step.

To find the next two numbers, we continue this pattern:

1. The next subtraction amount must be 5 - 2 = 3. So, the next term is 78 - 3 = 75.


2. The following subtraction amount is 3 - 2 = 1. So, the term after that is 75 - 1 = 74.

The next pair of numbers in the series is 75, 74.