# Aptitude - Odd Man Out and Series - Discussion

Discussion Forum : Odd Man Out and Series - Find Wrong No. (Q.No. 5)

*Directions to Solve*

Find out the wrong number in the series.

5.

190, 166, 145, 128, 112, 100, 91

Answer: Option

Explanation:

Go on subtracting 24, 21, 18, 15, 12, 9 from the numbers to get the next number.

190 - 24 = 166 166 - 21 = 145 145 - 18 = 127 [Here, 128 is placed instead of 127] 127 - 15 = 112 112 - 12 = 100 ... and so on.

Therefore, 128 is wrong.

Discussion:

11 comments Page 1 of 2.
Sujatha said:
12 months ago

Anyone, Please explain it clearly.

Ashish jat said:
6 years ago

When dividing numbers by 3 you will get remainder 1 but in 128 you will get remainder 2.

Hope it will help.

Hope it will help.

Apoorv said:
7 years ago

100 could also be the answer as it's only prefect squared number in the series.

Loyid said:
7 years ago

190 - 24(3 x 8) = 166,

166 - 21(3 x 7) = 145,

145 - 18(3 x 6) = 127 -----> Correct and 128 is wrong,

127 - 15(3 x 5) = 112,

112 - 12(3 x 4) = 100 -----> Multiples of 3 is subtracted from each number.

166 - 21(3 x 7) = 145,

145 - 18(3 x 6) = 127 -----> Correct and 128 is wrong,

127 - 15(3 x 5) = 112,

112 - 12(3 x 4) = 100 -----> Multiples of 3 is subtracted from each number.

Arun Kumar k said:
7 years ago

Can anyone make more understanding solution?

Hamsa said:
8 years ago

91-1 = 90.

100-1 = 99.

112-1 = 111.

128-1 = 127.

145-1 = 144.

166-1 = 165.

90, 99, 111, 144, 165 all are divisible by 3.

Except 127, So 128 is odd.

100-1 = 99.

112-1 = 111.

128-1 = 127.

145-1 = 144.

166-1 = 165.

90, 99, 111, 144, 165 all are divisible by 3.

Except 127, So 128 is odd.

Joyto Roy said:
9 years ago

Out of all the numbers only 100 is a perfect square.

So, in the series 100 is only the odd one out.

So, in the series 100 is only the odd one out.

Jyoti said:
1 decade ago

91+9=100

100+12=112

112+15=127 = 128 is wrong

127+18=145

145+21=166

166+24=190

100+12=112

112+15=127 = 128 is wrong

127+18=145

145+21=166

166+24=190

Roy said:
1 decade ago

190-166= 24 =8x3

166-145= 21 =7x3

145-127= 18 =6x3 <=128 is wrong

127-112= 15 =5x3

112-100= 12 =4x3

100-91 = 9 =3x3

166-145= 21 =7x3

145-127= 18 =6x3 <=128 is wrong

127-112= 15 =5x3

112-100= 12 =4x3

100-91 = 9 =3x3

Manisha said:
1 decade ago

Answer is not correctly explained. Please anyone explain.

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