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Number series: terms are perfect squares or close to them (n squared, n squared + 1, n squared - 1, n(n+1))

This type of question, asked 13 times: 10 Sep 2024 S3, 12 Sep 2024 S2, 24 Sep 2024 S2, 12 Sep 2025 S2, 12 Sep 2025 S3, 13 Sep 2025 S3, 14 Sep 2025 S1, 15 Sep 2025 S3, 16 Sep 2025 S2, 18 Sep 2025 S2, 21 Sep 2025 S3, 23 Sep 2025 S1, 26 Sep 2025 S3. All 15 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    10 Sep 2024 S3

    23
    Which of the following numbers will replace the question marks (?) in the given series? 4, ?, ?, 49, 121, 169, 289

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  2. Question 2

    12 Sep 2024 S2

    1
    Which of the following numbers will replace the question marks (?) in the given series? 16, 36, 64, ?, ?, 196, 256, 324

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  3. Question 3

    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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  4. Question 4

    12 Sep 2025 S2

    6
    What will come at the place of question mark? 2, 12, 30, 56, 90, ?

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  5. Question 5

    12 Sep 2025 S3

    3
    What comes next: 12, 30, 56, 90, 132, ?

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  6. Question 6

    12 Sep 2025 S3

    5
    Find the number that fits:2, 5, 10, 17, ?

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  7. Question 7

    13 Sep 2025 S3

    12
    Complete the series. 1, 4, ___, 16, 25

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  8. Question 8

    14 Sep 2025 S1

    18
    Find the missing number: 1, 4, 9, 16, ?, 36

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  9. Question 9

    15 Sep 2025 S3

    18
    What comes next in the series: 2, 6, 12, 20, 30, ?

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  10. Question 10

    16 Sep 2025 S2

    6
    What comes next: 2, 3, 10, 15, 26, 35, ?

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  11. Question 11

    18 Sep 2025 S2

    11
    What comes at the place of question mark: 2, 6, 12, 20, 30, ?

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  12. Question 12

    21 Sep 2025 S3

    24
    What should come at the place of question mark? 2, 5, 10, 17, 26, ?

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  13. Question 13

    21 Sep 2025 S3

    13
    What comes next: 10, 17, 26, 37, 50, ?

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  14. Question 14

    23 Sep 2025 S1

    17
    What should come at the place of question mark? 3, 8, 15, 24, 35, ?

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  15. Question 15

    26 Sep 2025 S3

    3
    In the following question, select the missing number from the given series. 169, 196, 225, 256, ?

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