Discussion
Home ‣ Aptitude ‣ Odd Man Out and Series Comments
- Question
- 15, 31, 63, 127, 255, (...)?
Options- A. 513
- B. 511
- C. 517
- D. 523
- Correct Answer
- 511
ExplanationEach number is double the preceding one plus 1. So, the next number is (255 x 2) + 1 = 511.
- 1. 8, 24, 12, 36, 18, 54, (...)?
Options- A. 27
- B. 108
- C. 68
- D. 72 Discuss
- 2. 8, 7, 11, 12, 14, 17, 17, 22, (...)?
Options- A. 27
- B. 20
- C. 22
- D. 24 Discuss
- 3. 105, 85, 60, 30, 0, - 45, - 90?
Options- A. 0
- B. 85
- C. -45
- D. 60 Discuss
- 4. 4, 6, 8, 9, 10, 11, 12?
Options- A. 10
- B. 11
- C. 12
- D. 9 Discuss
- 5. 3, 10, 21, 36, 55, 70, 105?
Options- A. 105
- B. 70
- C. 36
- D. 55 Discuss
- 6. 3, 7, 6, 5, 9, 3, 12, 1, 15, (...)?
Options- A. 18
- B. 13
- C. -1
- D. 3 Discuss
- 7. 16, 33, 65, 131, 261, (...)?
Options- A. 523
- B. 521
- C. 613
- D. 721 Discuss
- 8. 445, 221, 109, 46, 25, 11, 4?
Options- A. 221
- B. 109
- C. 46
- D. 25 Discuss
- 9. 19, 26, 33, 46, 59, 74, 91?
Options- A. 26
- B. 33
- C. 46
- D. 59 Discuss
- 10. 190, 166, 145, 128, 112, 100, 91?
Options- A. 100
- B. 166
- C. 145
- D. 128 Discuss
Odd Man Out and Series problems
Search Results
Correct Answer: 27
Explanation:
Number are alternately multiplied by 3 and divided by 2. So, next number = 54 / 2 = 27.
Correct Answer: 20
Explanation:
There are two series (8, 11, 14, 17, 20) and (7, 12, 17, 22). Increasing by 3 and 5 respectively.
Correct Answer: 0
Explanation:
Subtract 20, 25, 30, 35, 40, 45 from successive numbers. So 0 is wrong.
Correct Answer: 11
Explanation:
Each number is a composite number except 11.
Correct Answer: 70
Explanation:
The pattern is 1 x 3, 2 x 5, 3 x 7, 4 x 9, 5 x 11, 6 x 13, 7 x 15 etc.
So 70 is not correct.
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.
Correct Answer: 523
Explanation:
Each number is twice the preceding one with 1 added or subtracted alternately.
So, the next number is (2 x 261 + 1) = 523.
Correct Answer: 46
Explanation:
Go on subtracting 3 and dividing the result by 2 to obtain the next number. Clearly, 46 is wrong.
Correct Answer: 33
Explanation:
Go on adding 7, 9, 11, 13, 15, 17 respectively to obtain on the next number. So, 33 is wrong.
Correct Answer: 128
Explanation:
Go on subtracting 24, 21, 18, 15, 12, 9 from the numbers to get the next number. Clearly,128 is wrong.
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