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Number series: multiply by consecutive numbers (x2, x3, x4 ... or x5, x4, x3 ...)

This type of question, asked 4 times: 19 Jul 2023 S2, 26 Jul 2023 S2, 14 Sep 2025 S3, 18 Sep 2025 S1. All 4 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    19 Jul 2023 S2

    21
    Select the number from among the given options that can replace the question mark (?) in the following series. 2, 4, 12, 48, 240, ?

    Tap an option to check your answer.

  2. Question 2

    26 Jul 2023 S2

    13
    Which of the following numbers will replace the question mark (?) in the given series? 2, 10, 40, 120, 240, ?

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  3. Question 3

    14 Sep 2025 S3

    5
    Complete the series: 24,120, 720, 5040, 40320,__________?

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  4. Question 4

    18 Sep 2025 S1

    5
    What comes next: 1, 2, 6, 24, 120, ?

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