If y<>(not equal to) 3 and 3x/y is a prime integer : PS Archive
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# If y<>(not equal to) 3 and 3x/y is a prime integer

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CEO
Joined: 15 Aug 2003
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If y<>(not equal to) 3 and 3x/y is a prime integer [#permalink]

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01 Oct 2003, 13:59
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If y<>(not equal to) 3 and 3x/y is a prime integer greater than 2
which of the following is true?
1. x=y
2.y=1
3.a and y are prime integers.
SVP
Joined: 03 Feb 2003
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03 Oct 2003, 03:59
consider 3x/y=7

(1) x=y can be true, but not necessarily
(2) y=1, can be true, but not necessarily
(3) never true
Manager
Joined: 26 Aug 2003
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03 Oct 2003, 07:39
stolyar wrote:
consider 3x/y=7

(1) x=y can be true, but not necessarily
(2) y=1, can be true, but not necessarily
(3) never true

How can 3x/y be a prime number if y = 1? Wouldn't it be equal to 3x, having two factors, thus a non prime number?
03 Oct 2003, 07:39
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