Thursday, June 21, 2007

GRE ALGEBRA QUESTION OF THE DAY

Which of the following CANNOT be a factor of 2^i and
3^j , where i and j are positive integers?
(A) 6
(B) 8
(C) 27
(D) 42
(E) 54
at

16 comments:

  1. AnonymousJune 21, 2007 at 11:09 PM

    it can be either 8 or 27 coz,it was given as both multiple pf 2 "AND" 3

    ReplyDelete
  2. AnonymousJune 23, 2007 at 9:50 PM

    it can be 42 because , 42 is not only (purly) multiple of 2^i and 3^j ie
    42=2*3*7 ... 7 is not a multiple of 2^i and 3^j.

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  3. AnonymousJune 24, 2007 at 9:27 AM

    27

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  4. AnonymousJune 25, 2007 at 9:15 AM

    i think its 8.
    8 is not a factor of 3

    ReplyDelete
  5. Avinash ReddyJune 25, 2007 at 11:05 AM

    my answer is 8
    bcos 8 is a factor of 2 but not 3

    ReplyDelete
  6. AnonymousJune 26, 2007 at 7:59 AM

    if its 8 bcoz its not factor of 3 then 27 not factor of 2 ? how can u give that xplanation?

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  7. AnonymousJune 26, 2007 at 8:05 AM

    I think its 42 ,as all others the factors are 2 and 3 and only 42 has a 7 in it .

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  8. Sriram.RJune 27, 2007 at 9:10 AM

    its 42 . cos the possible factors are powers of 2 or powers of 3 or multiples of 6 and 42 doesn km under any of the above.

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  9. Aditya`s takeJune 28, 2007 at 7:00 AM

    This comment has been removed by the author.

    ReplyDelete
  10. Aditya`s takeJune 28, 2007 at 7:01 AM

    This comment has been removed by the author.

    ReplyDelete
  11. AnonymousJune 29, 2007 at 12:36 PM

    The Answer will b 42
    Bcause only in that along with 2 and 3 there is a no. 7 which is not allowed according 2 the statement
    42=2*3*7

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  12. AnonymousJuly 4, 2007 at 8:04 PM

    42 ,because ,
    42= 2*3*7

    7 is not in choice

    ReplyDelete
  13. Aditya`s takeJuly 6, 2007 at 12:41 PM

    actually the question is wrong...

    i and j are positive integers...

    hence for 8 and 27

    8=2^3*3^0

    27 = 3^3 * 2^0


    HENCE THE QUESTION IS WRONG

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  14. UnknownJuly 8, 2007 at 11:43 AM

    d . since 2*3*7=42 not possible

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  15. UnknownJuly 26, 2007 at 10:14 AM

    yah even i think the both 8 and 27 are the ans, cos 3 is not a factor of 8 and 2 is not a factor to 27.

    The Q says to find out the no. that isnt a multiple of both 2&3. In other words we have to find the no. that is not a multiple of 6.

    Hence the ans are both 8 and 27 according to me.

    ReplyDelete
  16. AnonymousAugust 18, 2007 at 1:27 AM

    i think it is 42 bcoz,
    2^3 = 8, 3^3 = 27, 2^1*3^1 = 6,
    2^1*3^3 = 54 but, 2^1*3^1*7^1 = 42

    ReplyDelete