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Direction: What will come in the place of question mark (?) in the following number.

  1. 1, 2, 6, 24, ? ,720
    1. 3
    2. 5
    3. 120
    4. 8
    5. None of these
Correct Option: C

As per given series , we can see that
First term = 1
Second term = First term × 2
Second term = 1 × 2 = 2
Similarly we can find the all others terms
Third term = Second term × 3
Third term = 2 × 3 = 6
Fourth term = Third term × 4
Fourth term = 6 × 4 = 24
Fifth term = Fourth term × 5
Fifth term = 24 × 5 = ?
∴ ? = 120
Sixth term = Fifth term × 6
Sixth term = 120 × 6 = 720


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