Exercise :: Odd Man Out and Series - Missing No.
- Odd Man Out and Series - Odd Man Out
- Odd Man Out and Series - Pick Wrong No.
- Odd Man Out and Series - Missing No.
- Odd Man Out and Series - Find Wrong No.
Insert the missing number.
| 11. | 5, 10, 13, 26, 29, 58, 61, (....) |
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Answer: Option A Explanation: Numbers are alternatively multiplied by 2 and increased by 3. So, the missing number = 61 x 2 = 122. |
| 12. | 15, 31, 63, 127, 255, (....) |
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Answer: Option B Explanation: Each number is double the preceding one plus 1. So, the next number is (255 x 2) + 1 = 511. |
| 13. | 1, 8, 27, 64, 125, 216, (....) |
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Answer: Option B Explanation: Numbers are 13, 23, 33, 43, 53, 63. So, the missing number is 73 = 343. |
| 14. | 3, 7, 6, 5, 9, 3, 12, 1, 15, (....) |
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Answer: Option C 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. |