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if X is integer > 0 and 4/x + 5/x + 6/x is also integer

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if X is integer > 0 and 4/x + 5/x + 6/x is also integer [#permalink] New post 09 Feb 2004, 08:50
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if X is integer > 0 and 4/x + 5/x + 6/x is also integer then which of the following is also an integer ?

1) x/5
2) 5/x
3) x/30
4) 30/x
5) x/120
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 [#permalink] New post 09 Feb 2004, 08:55
Answer is D
[4+5+6]/X = 15/X
D is 2 * 15/X = 30/X
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Paul

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Kudos [?]: 164 [0], given: 0

 [#permalink] New post 09 Feb 2004, 08:59
Answer is D
[4+5+6]/X = 15/X
D is 2 * 15/X = 30/X
_________________

Best Regards,

Paul

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Joined: 30 Oct 2003
Posts: 1798
Location: NewJersey USA
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Kudos [?]: 35 [0], given: 0

 [#permalink] New post 09 Feb 2004, 10:34
D is right I

did it differently.
we have 15/X X can be 1,3,5,15
Only 30 is divisible all these integers.


hi paul,

u double posted u r answer. Your approach is good too.

Anand.
  [#permalink] 09 Feb 2004, 10:34
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if X is integer > 0 and 4/x + 5/x + 6/x is also integer

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