Find the next number in the series:
9,20,38, 65, ?

Correct option is C

1. Information Given:
Series: 9, 20, 38, 65

2. Formula Used:
Increasing difference pattern

3. Explanation:
Step 1: Find differences
20 − 9 = 11
38 − 20 = 18
65 − 38 = 27
Differences: 11, 18, 27

Step 2: Find pattern in differences
18 − 11 = 7
27 − 18 = 9
Pattern: +7, +9 → next should be +11

Step 3: Find next difference
27 + 11 = 38

Step 4: Find next term
65 + 38 = 103

5. Final Answer:
103
✔ Correct Option: C