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- Odd Man Out and Series
26.
15, 31, 63, 127, 255, (....)
- A.513
- C.517
- B.511
- D.523
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| Each number is double the preceding one plus 1. |
| So, the next number is (255 x 2) + 1 = 511. |
27.
1, 3, 10, 21, 64, 129, 356, 777
- A.10
- C.64
- E.356
- B.21
- D.129
- Answer & Explanation
- Report
Answer : [E]
Explanation :
Explanation :
| A x 2 + 1, B x 3 + 1, C x 2 + 1, D x 3 + 1 and so on. So, 356 is wrong. |
28.
1, 2, 8, 33, 148, 760, 4626
- A.2
- C.33
- E.760
- B.8
- D.148
- Answer & Explanation
- Report
Answer : [E]
Explanation :
Explanation :
| 2nd term = (1st term x 1 + 12) = 1 x 1 + 12 = 2; | |||||
| 3rd term = (2nd term x 2 + 22) = 2 x 2 + 22 = 8; | |||||
| 4th term = (3rd term x 3 + 32) = 8 x 3 + 32 = 33; | |||||
| 5th term = (4th term x 4 + 42) = 33 x 4 + 42 = 148; | |||||
| 6th term = (5th term x 5 + 52) = 148 x 5 + 52 = 765 | |||||
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29.
8, 24, 12, 36, 18, 54, (.....)
- A.27
- C.68
- B.108
- D.72
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| Numbers are alternately multiplied by 3 and divided by 2 | ||||
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30.
2, 5, 10, 50, 500, 5000
- A.0
- C.10
- B.5
- D.5000
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| Pattern is 1st x 2nd = 3rd; 2nd x 3rd = 4th; 3rd x 4th = 5th |
| But, 4th x 5th = 50 x 500 = 2500 ≠ 5000 = 6th |
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