Find the alternative number to replace the question mark 1, 2, 6, 24, ?, 720
2025
Find the alternative number to replace the question mark
1, 2, 6, 24, ?, 720
- A.
100
- B.
104
- C.
108
- D.
120
Attempted by 474 students.
Show answer & explanation
Correct answer: D
Solution: Recognize the sequence as factorials: each term equals n! for n = 1, 2, 3, 4, 5, 6.
1 = 1!
2 = 2!
6 = 3!
24 = 4!
? = 5! = 120
720 = 6!
Answer: 120 (since the missing term is 5! = 120).