Discussion
Home ‣ Aptitude ‣ Odd Man Out and Series Comments
- Question
190, 166, 145, 128, 112, 100, 91
Options- A. 100
- B. 166
- C. 145
- D. 128
- E. 112
- Correct Answer
- 128
ExplanationGo 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.
Odd Man Out and Series problems
Search Results
- 1. 445, 221, 109, 46, 25, 11, 4
Options- A. 221
- B. 109
- C. 46
- D. 25
- E. 11 Discuss
Correct Answer: 46
Explanation:
Go on subtracting 3 and dividing the result by 2 to obtain the next number.Clearly, 46 is wrong.
- 2. 196, 169, 144, 121, 100, 80, 64
Options- A. 169
- B. 144
- C. 121
- D. 100
- E. 80 Discuss
Correct Answer: 80
Explanation:
Numbers must be (14)2, (13)2, (12)2, (11)2, (10)2, (9)2, (8)2.So, 80 is wrong.
- 3. 1, 1, 2, 6, 24, 96, 720
Options- A. 720
- B. 96
- C. 24
- D. 6
- E. 2 Discuss
Correct Answer: 96
Explanation:
Go on multiplying with 1, 2, 3, 4, 5, 6 to get next number.So, 96 is wrong.
- 4. 7, 8, 18, 57, 228, 1165, 6996
Options- A. 8
- B. 18
- C. 57
- D. 228
- E. 1165 Discuss
Correct Answer: 228
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.
- 5. 3, 7, 6, 5, 9, 3, 12, 1, 15, (....)
Options- A. 18
- B. 13
- C. -1
- D. 3 Discuss
Correct Answer: -1
Explanation:
There are two series, beginning respectively with 3 and 7. In one 3 is added and in another 2 is subtracted.The next number is 1 - 2 = -1.
- 6. 19, 26, 33, 46, 59, 74, 91
Options- A. 26
- B. 33
- C. 46
- D. 59
- E. 74 Discuss
Correct Answer: 33
Explanation:
Go on adding 7, 9, 11, 13, 15, 17 respectively to obtain the next number.So, 33 is wrong. It must be 35
- 7. 1, 3, 10, 21, 64, 129, 356, 777
Options- A. 10
- B. 21
- C. 64
- D. 129
- E. 356 Discuss
Correct Answer: 356
Explanation:
A x 2 + 1, B x 3 + 1, C x 2 + 1, D x 3 + 1 and so on.So, 356 is wrong.
- 8. 6, 12, 48, 100, 384, 768, 3072
Options- A. 768
- B. 384
- C. 100
- D. 48
- E. 12 Discuss
Correct Answer: 100
Explanation:
Each even term of the series is obtained by multiplying the previous term by 2.2nd term = (1st term) x 2 = 6 x 2 = 12
4th term = (3rd term) x 2 = 48 x 2 = 96.
6th term = (5th term) x 2 = 384 x 2 =768.
∴ 4th term should be 96 instead of 100.
- 9. 40960, 10240, 2560, 640, 200, 40, 10
Options- A. 640
- B. 40
- C. 200
- D. 2560
- E. 10240 Discuss
Correct Answer: 200
Explanation:
Go on dividing by 4 to get the next number.So, 200 is wrong.
- 10. 3, 7, 15, 39, 63, 127, 255, 511
Options- A. 7
- B. 15
- C. 39
- D. 63
- E. 127 Discuss
Correct Answer: 39
Explanation:
Go on multiplying 2 and adding 1 to get the next number.So, 39 is wrong.
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