Aptitude - Odd Man Out and Series - Discussion

Find out the wrong number in the given sequence of numbers.

14. 

56, 72, 90, 110, 132, 150

[A]. 72
[B]. 110
[C]. 132
[D]. 150

Answer: Option D

Explanation:

The numbers are 7 x 8, 8 x 9, 9 x 10, 10 x 11, 11 x 12, 12 x 13.

So, 150 is wrong.


Prasanna said: (Nov 15, 2010)  
Here the alternate way is available.... that is
56+16=72
72+18=90
90+20=110
110+22=132
132+24=156
so the 150 is wrong here :)

Udayakumar said: (Dec 27, 2010)  
Differences b/w the ith term and (i+1)th term starts from 16 and goes on increasing by 2... The last no 150 doesn't satisfy this condition.

Mehar said: (Jan 7, 2011)  
72-56=16;
90-72=18;
110-90=20;
132-110=22;
150-132=18; So it is disturbs the sequence of flow.

Bharu said: (Aug 27, 2011)  
56+90=146
(146-2)/2= 72

Similarly
(72+110-2)/2= 90.......
(110+150-2)/2=129 but not 132 so 150 is wrong.

Prashanth said: (Sep 22, 2011)  
7^2+7=56
8^2+8=72
9^2+9=90
10^2+10=110
11^2+11=132
12^2+12=156

So 150 is wrong.

Megha said: (Feb 19, 2012)  
I think 110 is not divisible by 3. All others are divisible by 3. So 110 is also wrong

Payel said: (Mar 8, 2012)  
Megha you are wrong. 56 is not divisible by 3.

Amarendra said: (Aug 23, 2012)  
56,72,90,132,150 are divisible by 3
but not 110 so 110 is also answer

Akula Sai Kumar said: (Dec 20, 2012)  
The difference between the 2 successive numbers ie,72-56=16,90-72=18,110-90=20,132-110=22,{150-132=18}which has to be 24.so 150 is the wrong no.

"be tricky"

Mishti said: (Aug 13, 2013)  
According to the differences of the respective numbers next term should be 156.

But according to the given explanation the next term should be 172.

Really confusing.

Manikandan said: (Aug 29, 2013)  
72-56=16;
90-72=18;
110-90=20;
132-110=22;
150-132=18; So 150 is wrong.

Kartik said: (Dec 30, 2013)  
You can even think this way.

1) The first two digits are following odd numbers.

i.e. 5+2=7, 7+2=9...

2) The last digit is some what like this.

6, 2, 0, 0, 2, 6...

But 150 didn't satisfy 2nd rule. I think this is crazy thought.

Badri said: (Feb 15, 2014)  
It may also be like this, Going on adding 16, 18, 20, 22, 24. So 150 is the wrong answer because it should be replaced by 156.

Aravind said: (Mar 6, 2014)  
If we take 6 as divisor, then 110 will be answer. Because all others are divisible by 6.

Dharani said: (Jul 17, 2014)  
56, 72, 90, 110, 132, 150

1st digits = 5, 7, 9, 11, 13, 15.
Last digits = 6, 2, 0, 0, 2, 6.

So 6 is missing at the last digit of 150.

Minj said: (Sep 5, 2014)  
All are divisible by 3, except 110. So 110 is odd one.

Raj said: (Apr 7, 2015)  
The last digits are 6, 2, 0, 6, 2, 0.

Hence 110 is the odd no.

Sandip Pradhan said: (Jul 5, 2016)  
The numbers are 7 x 8, 8 x 9, 9 x 10, 10 x 11, 11 x 12, 12 x 13.

So, 150 is wrong.

Sagar said: (Jul 18, 2016)  
If logic of numbers divisible by 3 is applied then 110 becomes odd.

Mounika said: (Jul 25, 2016)  
56 is not divisible by 6 & 3.

150 disturbs the series of adding +16, +18, +20, +22, +24.

The right no is 154.

So 150 is the odd number.

Sree said: (Jul 26, 2016)  
Given 56, 72, 90, 110, 132, 150.

Now lets check their squares 56 = 7 square (49) + 7 = 56.

Likewise in case of 72 = 8 square (64) + 8 = 72.

But in case of 150 = 12square (144) + 12 = 156.

So 150 is an odd number to be outed friends.

Abhinav said: (Aug 8, 2016)  
All the numbers except 110 are divisible by 3. And hence in my opinion 110 is wrong option.

Manjupriya said: (Aug 11, 2016)  
Given 56, 72, 90, 110, 132, 150.

7 * 8 = 56.
8 * 9 = 72.
9 * 10 = 90.
10 * 11 = 110.
11 * 12 = 132.
12 * 13 = 156.

From the above explanation, 150 is incorrect. So it is odd one.

Suyash More said: (Sep 12, 2016)  
60 - 4 = 56,
80 - 8 = 72,
100 - 10 = 90,
100 + 10 = 110,
120 + 12 = 132.

Anshu Tiwari said: (Jan 12, 2017)  
56 + 16 = 72
72 + 18 = 90
90 + 20 = 110
110 + 22 = 132
132 + 18 = 150

So, 150 is wrong.

Raj Verma said: (Jan 20, 2017)  
72 + 60 = 132
90 + 60 = 150
56 + 60 = 116

But given is 110, this is also a type of series and 110 is also an answer.

So it's a multiple type answer.

Ashwin said: (Jan 23, 2017)  
All the number except 110 are exactly divisible by 3 so 110 is also a correct answer.

Dinesh Kumar said: (Mar 8, 2017)  
7 2 -56 = 16
90 - 72 = 18
110 - 90 = 20
132 - 110 = 22
150 - 132 = 18.

So, 150 is wrong.

Adhiyan said: (Oct 16, 2017)  
@ALL.

5 + 2 = 7
6 - 4 = 2
72

7 + 2 = 9
2 - 2 = 0
90

9 + 2 = 11
0 - 0 = 0
110

11 + 2 = 13
0 - 2 = - 2
132

13 + 2 = 15
- 2 - 4 = - 6
156

NOTE : JUST IGNORE THE MINUS ( - ) SYMBOL.

Sushrita said: (Jul 11, 2018)  
110 can also be answer of this. As all numbers except 110 are divisible by 6. So it can be 110. Isn't it?

Priya said: (Nov 15, 2018)  
No, @Sushrita.

56 is also not divisible by 6.

Mariya said: (Feb 28, 2019)  
72-56 = 16
90-72 = 18
110-90 = 20 132-110 = 22.

So, the next term is 132 + 24 = 156.
Therefore option [D] is the answer.

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