Odd Man Out and Series
- 4 - 8, 16 - 32, 64 - (...) :
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Each number is the preceding number multiplied by - 2. So, the required number is - 128.
Correct Option: B
Each number is the preceding number multiplied by - 2. So, the required number is - 128.
- 125, 123, 120, 115, 108, 100, 84 ?
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Prime numbers 2, 3, 5, 7, 11, 13 have successively been subtracted. So, 100 is wrong. It must be (108 - 11) i.e., 97.
Correct Option: C
Prime numbers 2, 3, 5, 7, 11, 13 have successively been subtracted. So, 100 is wrong. It must be (108 - 11) i.e., 97.
- 125, 127, 130, 135, 142, 153, 165 ?
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Prime number 2, 3, 5, 7, 11, 13 are to be added successively. So, 165 is wrong.
Correct Option: D
Prime number 2, 3, 5, 7, 11, 13 are to be added successively. So, 165 is wrong.
- 52, 51, 48, 43, 34, 27, 16 ?
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Subtract 1, 3, 5, 7, 9, 11 from successive numbers. So, 34 is wrong.
Correct Option: B
Subtract 1, 3, 5, 7, 9, 11 from successive numbers. So, 34 is wrong.
- Find the wrong number in the series 3, 8, 15, 24, 34, 48, 63 ?
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The difference between consecutive terms are respectively. 5, 7, 9, 11 and 13. So, 34 is a wrong number.
Correct Option: C
The difference between consecutive terms are respectively. 5, 7, 9, 11 and 13. So, 34 is a wrong number.
