# Aptitude - Odd Man Out and Series - Discussion

### Discussion :: Odd Man Out and Series - Find Wrong No. (Q.No.2)

Find out the wrong number in the series.

2.

1, 1, 2, 6, 24, 96, 720

 [A]. 720 [B]. 96 [C]. 24 [D]. 6 [E]. 2

Explanation:

Go on multiplying with 1, 2, 3, 4, 5, 6 to get next number.

So, 96 is wrong.

 Santhosh said: (Aug 13, 2011) I could not understand this problem, can you explain clearly please?

 Cemi said: (Aug 30, 2011) I also could not understand this.

 Menaga said: (Sep 26, 2011) Go on multiflying with 1,2,3,4,5,6.... 1*1=1 1*2=2 2*3=6 6*4=24 24*5=120 120*6=720 The correct answer is 120. So 96 is the wrong number in the given series.

 Pavan said: (Sep 22, 2013) Series can be written as 1, 1!, 2!, 3!, 4!, 5!, 6! = 1, 1, 2, 6, 24, 120, 720. So odd number is 96 in given series.

 Sweta said: (Oct 2, 2013) 1*1=1 1*2=2 2*3=6 6*4=24 24*5=120 120*6=720 So, 96 is not correct.

 Athira said: (Jul 9, 2015) Thanks for your clarification.

 Karthik said: (Jun 23, 2016) Factorials: i.e o!, 1!, 2!, 3!, ....

 Mounika said: (Dec 20, 2016) Thanks for your wonderful explanation @Menaga.

 Sakshi Deo said: (Jan 22, 2018) I didn't understand the significance of 1 two times in the series! Any justification?

 Galactic said: (Feb 20, 2018) Correct series is 0! 1! 2! 3! 4! 5! 6!. 5! is 120 not 96.

 Fazeena said: (May 25, 2018) Thanks for the given explanation. Thank you all.

 Rm Mukesh said: (Mar 27, 2020) The pattern is *1, *2, *3, *4. So, the missing term = 24x5 = 120.

 Arnav said: (Jan 7, 2022) Thank you, this is very helpful for me.