Terms are n squared + 1 (2, 5, 10, 17, 26 ...)

The same question, asked 3 times: 24 Sep 2024 S2*, 12 Sep 2025 S3*, 21 Sep 2025 S3. Every wording below, oldest first.

Try each one first, then open its answer.

Question 1
24 Sep 2024 S2
11 $Select the number from among the given options that can replace the question mark (?) in the following series. 5, 10, 17, 26, 37, ?$
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Question 2
12 Sep 2025 S3
5 $Find the number that fits:2, 5, 10, 17, ?$
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Question 3
21 Sep 2025 S3
24 $What should come at the place of question mark? 2, 5, 10, 17, 26, ?$
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Question 4
21 Sep 2025 S3
13 $What comes next: 10, 17, 26, 37, 50, ?$
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Question 1