What is the next number in the series, 15, 45, 75, 105?
- 125
- 115
- 135
- 189
Explanation
Step 1: Find the pattern
Check the difference between consecutive terms:
-
45 − 15 = 30
-
75 − 45 = 30
-
105 − 75 = 30
So the series increases by 30 each time.
Step 2: Find the next number
105 + 30 = 135
Last updated on 09-03-2026
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