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Aptitude Odd Man Out and Series Test Paper 2


6) Find out the wrong number in the series:
125, 106, 88, 76, 65, 58, 53

  1. 125
  2. 106
  3. 88
  4. 76
  5. 65

Answer: C

Explanation:

To get the next number in the given series go on subtracting prime numbers 19, 17, 13, 11, 7, and 5 from the numbers.
Like: 125 - 19 = 106
106 - 17 = 89
89 - 13 = 76
76 - 11 = 65
65 - 7 = 58
58 - 5 = 53

So, the wrong number in the series is 88.


7) What should come in place of the question mark (?) in the following number series:
4, 5, 14, 51, ?

  1. 220
  2. 162
  3. 280
  4. 216

Answer: A

Explanation:

The sequence in the given series is

x 1 + 12 = 4 x 1 + 12 = 4+1 = 5,
x 2 + 22 = 5 x 2 + 22 = 10+4 = 14,
x 3 +32 = 14 x 3 + 32 = 42 + 9 = 51,
x 4 + 42 = 51 x 4 + 42 = 204 + 16 = 220

Therefore, the missing number is 220.


8) Find out the wrong number in the series:
455, 445, 465, 435, 485, 415,515,455

  1. 455
  2. 465
  3. 485
  4. 415

Answer: A

Explanation:

The given series is made of two different series:

First: 455, 465, 485, 515, and

Second: 445, 435, 415,455

The sequence in first series is + 10, + 20, + 30, and the sequence in second series: -10, -20. So, the number 455 is wrong as it should be 415 - 30 = 385


9) 264     136     72     40
488     (a)     (b)     (c)     (d)     (e)

Which of the following numbers will come in place of (a)?

  1. 128
  2. 248
  3. 38
  4. 23

Answer: B

Explanation:

The given series is ÷ 2 + 4, ÷ 2+4,... Therefore the first series is as follows:

Apti Odd Man Out and Series

10) 2     17     121     729
5     (a)     (b)     (c)     (d)     (e)

Which of the following numbers will come in place of (b)?

  1. 289
  2. 41
  3. 17393
  4. 1448

Answer: A

Explanation:

The given sequence is

X * 8 + 1 i.e., 2 * 8 +1 = 16 + 1 = 17
X * 7 + 2 i.e., 17 * 7 + 2 = 119 + 2 = 121
X * 6 + 3 i.e., 121 * 6 + 3 = 726 + 3 = 729...

Therefore:

(a) = 5 X 8 + 1 = 41.
(b) = 41 X 7 + 2 = 289.


Aptitude Odd Man Out and Series Test Paper 1
Aptitude Odd Man Out and Series Test Paper 3
Odd Man Out and Series Concepts





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