RCMP Police Aptitude Battery (RPAB) · Question
Series: 3, 7, 13, 21, ?
The differences between consecutive numbers increase by 2 each time: (+4, +6, +8). The next difference should be +10, so 21 + 10 = 31.
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Question: Series: 3, 7, 13, 21, ?
Answer options:
- 29
- 31
- 33 ✅ 35
Correct answer: 35
Explanation: The differences between consecutive numbers increase by 2 each time: (+4, +6, +8). The next difference should be +10, so 21 + 10 = 31.
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