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In each of the following questions four ...

In each of the following questions four of the given five are alike in a certain way and form a group .Which is the one that does not belong to that group in the following questions ?

A

15

B

57

C

7

D

31

Text Solution

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The correct Answer is:
B
Except 57 , all others are in `2^(x)-1` pattern i.e.,
`15=2^(4)-1,7=2^(3)=1,31=2^(5)-1`
But `57=2^(6)-7`.
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LUCENT PUBLICATION-CLASSIFICATION OF NUMERALS : ODD MAN OUT -Exercise -1
  1. In each of the following questions three of the given four are alike i...

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  2. In each of the following questions four of the given five are alike in...

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  3. In each of the following questions three of the given four are alike i...

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  4. In each of the following questions four of the given five are alike in...

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  5. In each of the following questions three of the given four are alike i...

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  6. In each of the following questions three of the given four are alike i...

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  7. In each of the following questions four of the given five are alike in...

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  8. In each of the following questions four of the given five are alike in...

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  9. In each of the following questions four of the given five are alike in...

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  10. In each of the following questions four of the given five are alike in...

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  11. In each of the following questions four of the given five are alike in...

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  12. In each of the following questions four of the given five are alike in...

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  13. In each of the following questions four of the given five are alike in...

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  14. In each of the following questions four of the given five are alike in...

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  15. In each of the following questions four of the given five are alike in...

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  16. In each of the following questions four of the given five are alike in...

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  17. In each of the following questions three of the given four are alike i...

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  18. In each of the following questions four of the given five are alike in...

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  19. In each of the following questions four of the given five are alike in...

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  20. In each of the following questions four of the given five are alike in...

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