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Number series: multiply by consecutive numbers and add or subtract (x2+1, x3+1 ... / x1+1, x2+2 ...)

This type of question, asked 6 times: 9 Sep 2024 S1, 11 Sep 2024 S2, 12 Sep 2024 S3, 19 Sep 2024 S1, 15 Sep 2025 S1, 17 Sep 2025 S2. All 6 questions below, oldest first.

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  1. Question 1

    9 Sep 2024 S1

    25
    Which of the following numbers will replace the question mark (?) in the given series? 1, 3, 10, 41, ?, 1237

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  2. Question 2

    11 Sep 2024 S2

    4
    Select the number from among the given options that can replace the question mark (?) in the following series. 3, 20, 121, 604, 2417, ?

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  3. Question 3

    12 Sep 2024 S3

    23
    Which of the following numbers will replace the question mark (?) in the given series? 7, 13, ?, 145, 721, 4321

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  4. Question 4

    19 Sep 2024 S1

    20
    Which of the following numbers will replace the question mark (?) in the given series? 3, 17, 83, 329, ?, 1961

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  5. Question 5

    15 Sep 2025 S1

    5
    What will come at the place of question mark? 1, 2, 6, 21, 88, ?

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  6. Question 6

    17 Sep 2025 S2

    7
    Find the missing term: 7, 22, 89, ________, 2677, 18740

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