# Aptitude - Odd Man Out and Series - Discussion

Discussion Forum : Odd Man Out and Series - Find Wrong No. (Q.No. 1)
Directions to Solve
Find out the wrong number in the series.

1.
7, 8, 18, 57, 228, 1165, 6996
8
18
57
228
1165
Explanation:

Let the given numbers be A, B, C, D, E, F, G.

Then, A, A x 1 + 1, B x 2 + 2, C x 3 + 3, D x 4 + 4, E x 5 + 5, F x 6 + 6 are the required numbers.

Clearly, 228 is wrong.

Discussion:
22 comments Page 1 of 3.

Preet Dhaliwal said:   2 years ago
Thanks for explaining.

Sushant said:   5 years ago
Nice, thanks @Sundar.

Shreyansh jain said:   5 years ago
Thanks @Sundar.

Geetika Rana said:   6 years ago
I agree @Girish.

I also have the same value 196.

Girish said:   6 years ago
@Suvra Saurav

I think may be 96 is 196.

Because 196- 14^2.
169- 13^2
144- 12^2
121- 11^2
And there is "101" wrong number.

Suvra Saurav said:   7 years ago
Can any one solve this for me?

96, 169, 144, 121, 101 find the wrong number.

Niharika said:   7 years ago
It can also be done as:

A, (A+1)X1, (B+1)X2, (C+1)X3, (D+1)X4, (E+1)X5, (F+1)X6.
i.e.,

A = 7.
B = (7+1)X1 = 8.
C = (8+1)X2 = 18.
D = (18+1)X3 = 57.
E = (57+1)X4 = 232.
F = (232+1)X5 = 1165.
(3)

Sree said:   7 years ago
Thanks @Sundar and @Nandini.

Vikram kumar said:   8 years ago
It is understanding for me. Thanks for the explanation.

Tapan ghosh said:   8 years ago
Thanks @Nandini and @Sundar. Logic is very easy after your explanation.