# Aptitude - Odd Man Out and Series - Discussion

Discussion Forum : Odd Man Out and Series - Find Wrong No. (Q.No. 11)

*Directions to Solve*

Find out the wrong number in the series.

11.

64, 71, 80, 91, 104, 119, 135, 155

Answer: Option

Explanation:

Go on adding 7, 9, 11, 13, 15, 17, 19 respectively to obtain the next number.

So, 135 is wrong.

Discussion:

11 comments Page 1 of 2.
Devil said:
5 years ago

71 should be the answer as it is the only prime no in the series.

Kunal Shriwas said:
5 years ago

But 71 is the only Prime number in the series so it should be correct.

Sanky said:
6 years ago

I can't understand this logic. Please explain the logic.

Manish said:
7 years ago

The difference between 1st two number is 7 now add 2 in the difference of 1st 2 no. You will get the difference but 2nd and 3rd. Similarly, adds 2 in this difference you will get different between 3rd and 4th. Check in this way you will find that 135 is wrong instead of this there should be 136.

Pramod g said:
8 years ago

I can't understand this solution please explain it clearly.

Bindu chauhan said:
8 years ago

I can't understand this solution please explain.

Manikant Thakur said:
8 years ago

But we can also think in this way that all no is composite no. other than 71 (Prime No).

So 71 should also be the right answer.

So 71 should also be the right answer.

Debashree said:
1 decade ago

Yes this logic is right.

But If we say 71 is the only odd number in the series where others are even then?

But If we say 71 is the only odd number in the series where others are even then?

Tarun said:
1 decade ago

I can't understand please send us details how this solve brefely.

Mirajkar89 said:
1 decade ago

Just add 119+17=136 but not 135, therefore 135 is wrong.

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