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# Is X prime? (1) X is a perfect square (2) X^2 is a perfect

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SVP
Joined: 03 Feb 2003
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Is X prime? (1) X is a perfect square (2) X^2 is a perfect [#permalink]

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12 Jul 2004, 00:34
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Is X prime?

(1) X is a perfect square
(2) X^2 is a perfect square

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Senior Manager
Joined: 25 Dec 2003
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Location: India

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12 Jul 2004, 00:49
E (not enough info from both)

x can be 4 or 16.
_________________

Giving another SHOT

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Senior Manager
Joined: 19 May 2004
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12 Jul 2004, 01:43
A.

1) X can not be a prime.

2) X could be prime, or any other integer.

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Manager
Joined: 08 Jun 2004
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12 Jul 2004, 04:53
the ans is ...

A ...

statement one: X is a perfect square... which means that X has a number lets suppose 'y' that multiplied into itself will give rasie to X

ex ---- > y * y= X, y=2 so , 2*2=4=X...now X can never be a prime 'cos it does have another integer which can divide X apart from X and the number 1 ( which is the sloe requisite of a prime number !)

sufficient

B-> says X ^2 is a prime number and now we got all the number s which fulfill this nescessity...we got 2 to satisfy this condition as well 4 too... which is not a prime whereas the number 2 is . not sufficient

Have fun
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the whole worldmakes way for the man who knows wer he's going... good luck

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Manager
Joined: 21 Jun 2004
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17 Jul 2004, 00:06
enigmatic007 wrote:
the ans is ...

A ...

statement one: X is a perfect square... which means that X has a number lets suppose 'y' that multiplied into itself will give rasie to X

ex ---- > y * y= X, y=2 so , 2*2=4=X...now X can never be a prime 'cos it does have another integer which can divide X apart from X and the number 1 ( which is the sloe requisite of a prime number !)

sufficient

B-> says X ^2 is a prime number and now we got all the number s which fulfill this nescessity...we got 2 to satisfy this condition as well 4 too... which is not a prime whereas the number 2 is . not sufficient

Have fun

Good explination, But the woridng are so tricky that you woudl jump to E suddenly, need to hold the cluch before changign the gears

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17 Jul 2004, 00:06
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