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Next number in series 1, 1, 2, 6, 24, ?

Question: Next number in series 1, 1, 2, 6, 24, ?
  • A. 60
  • B. 120 ✓
  • C. 100
  • D. 144
Correct Answer: B. 120
Explanation: The series follows n! (factorial): 1=1!, 1=1!, 2=2!, 6=3!, 24=4!, so 120=5!.

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