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Home ‣ Aptitude ‣ Odd Man Out and Series Comments
- Question
6, 12, 48, 100, 384, 768, 3072
Options- A. 768
- B. 384
- C. 100
- D. 48
- E. 12
- Correct Answer
- 100
ExplanationEach 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.
Odd Man Out and Series problems
Search Results
- 1. 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.
- 2. 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
- 3. 190, 166, 145, 128, 112, 100, 91
Options- A. 100
- B. 166
- C. 145
- D. 128
- E. 112 Discuss
Correct Answer: 128
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.
- 4. 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.
- 5. 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.
- 6. 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.
- 7. 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.
- 8. 64, 71, 80, 91, 104, 119, 135, 155
Options- A. 71
- B. 80
- C. 104
- D. 119
- E. 135 Discuss
Correct Answer: 135
Explanation:
Go on adding 7, 9, 11, 13, 15, 17, 19 respectively to obtain the next number.So, 135 is wrong.
- 9. 15, 16, 34, 105, 424, 2124, 12756
Options- A. 16
- B. 34
- C. 105
- D. 424
- E. 2124 Discuss
Correct Answer: 2124
Explanation:
2nd term = (1st term) x 1 + 1 = 15 x 1 + 1 = 16.3rd term = (2nd term) x 2 + 2 = 16 x 2 + 2 = 34.
4th term = (3th term) x 3 + 3 = 34 x 3 + 3 = 105.
5th term = (4th term) x 4 + 4 = 105 x 4 + 4 = 424
6th term = (5th term) x 5 + 5 = 424 x 5 + 5 = 2125
∴ 6th term should 2125 instead of 2124.
- 10. 10, 26, 74, 218, 654, 1946, 5834
Options- A. 26
- B. 74
- C. 218
- D. 654
- E. 1946 Discuss
Correct Answer: 654
Explanation:
2nd term = (1st term) x 3 - 4 = 10 x 3 - 4 = 26.3rd term = (2nd term) x 3 - 4 = 26 x 3 - 4 = 74.
4th term = (3th term) x 3 - 4 = 74 x 3 - 4 = 218.
5th term = (4th term) x 3 - 4 = 218 x 3 - 4 = 650.
∴ 5th term must be 650 instead of 654.
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