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ashkg
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prime number problem 05 Jun 2005, 20:55
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I got this wrong in a paper test.



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ashkg
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prime number problem 05 Jun 2005, 21:08
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are u sure :?:
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sparky
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prime number problem 05 Jun 2005, 21:20
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D. 7-4 =3

the rest is clear, except for E, probably. E is always even, therefore not a prime.
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prime number problem 05 Jun 2005, 21:43
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ashkg
are u sure :?:
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well I guess that is the mistake you made too! :oops greater than 2 !!

has to be D
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krisrini
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prime number problem 05 Jun 2005, 22:10
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Vithal
ashkg
are u sure :?:

well I guess that is the mistake you made too! :oops greater than 2 !!

has to be D
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What if x = 13, then x -4 = 9 which is not a prime. I do not find the answer in the choices provided.
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HIMALAYA
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prime number problem 05 Jun 2005, 22:15
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krisrini
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ashkg
are u sure :?:

well I guess that is the mistake you made too! :oops greater than 2 !!has to be D

What if x = 13, then x -4 = 9 which is not a prime. I do not find the answer in the choices provided.
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the question says "could be" not must be. so D could be a prime.
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prime number problem 05 Jun 2005, 22:20
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HIMALAYA
krisrini
Vithal
ashkg
are u sure :?:

well I guess that is the mistake you made too! :oops greater than 2 !!has to be D

What if x = 13, then x -4 = 9 which is not a prime. I do not find the answer in the choices provided.

the question says "could be" not must be. so D could be a prime.
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Yes, Himalaya you are right. I should have read the question more focussed. I agree The answer should be D.
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prime number problem 05 Jun 2005, 23:06
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x^2=x*x not prime
x/2 not an integer, not prime
3x=3*x not prime
X^2+1 is an even number greater than 2, not prime

D
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HowManyToGo
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prime number problem 06 Jun 2005, 09:43
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Agree with D.

basically eliminated the rest.


HMTG.



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