# Aptitude - Odd Man Out and Series - Discussion

Discussion Forum : Odd Man Out and Series - Find Wrong No. (Q.No. 2)
Directions to Solve
Find out the wrong number in the series.

2.
1, 1, 2, 6, 24, 96, 720
720
96
24
6
2
Explanation:

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

So, 96 is wrong.

Discussion:
13 comments Page 1 of 2.

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.
(1)

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.
(1)

1*1=1
1*2=2
2*3=6
6*4=24
24*5=120
120*6=720

So, 96 is not correct.
(1)

RM MUKESH said:   4 years ago
The pattern is *1, *2, *3, *4.

So, the missing term = 24x5 = 120.
(1)

I could not understand this problem, can you explain clearly please?

I also could not understand this.

Athira said:   8 years ago

Karthik said:   7 years ago
Factorials: i.e o!, 1!, 2!, 3!, ....

Mounika said:   7 years ago
Thanks for your wonderful explanation @Menaga.

Sakshi Deo said:   6 years ago
I didn't understand the significance of 1 two times in the series!

Any justification?