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If x is a prime number, what is the value of x? 1. x<15

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If x is a prime number, what is the value of x? 1. x<15 [#permalink]

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New post 01 Apr 2006, 22:46
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

If x is a prime number, what is the value of x?

1. x<15
2. (x-2) is a multiple of 5

i'll post the answer later.

its a data sufficiency so the answer options are the same as always.
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New post 02 Apr 2006, 00:38
Answer B

x can be 2,3,5 or 7

1) statement covers the whole range..... insufficient
2) statement (n-2)/5= interger.... only 7 satisfies this eqation.... sufficient

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New post 02 Apr 2006, 01:54
Firstly:

1. Does not give you the answe

2. (x-2) is a multiple of 5

- ALSO DOES NOT give you any specific answer!

x could be 2, 7, 17.. (0 is a multiple of all numbers!!!). We cannot assume that X is less than 15.


both together also does not work!

So E

Nice Question!

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New post 02 Apr 2006, 02:32
Oh yeah it is not necessarilly one digit number :)

But the answer shoud be C....

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New post 02 Apr 2006, 02:36
(C)

Take the two statements together and the answer can only be one number, 7.

Seems like a Kaplan problem....

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New post 02 Apr 2006, 04:41
sm176811 wrote:
What about 0?!!


You're right. x could also be 2 (besides 7).

So the answer is E.

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New post 02 Apr 2006, 10:39
Cannot be 2 because 0/5 is not defined......

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New post 02 Apr 2006, 10:54
SimaQ wrote:
Cannot be 2 because 0/5 is not defined......


0/5 is defined, 5/0 is not defined.

It should be "E"

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New post 02 Apr 2006, 10:55
SimaQ wrote:
Cannot be 2 because 0/5 is not defined......


0/anything is 0 but not the other way which is anything/0 which is undefined

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New post 02 Apr 2006, 12:57
trivikram wrote:
SimaQ wrote:
Cannot be 2 because 0/5 is not defined......


0/anything is 0 but not the other way which is anything/0 which is undefined


Yep, you are right.... :)

I missed that... Answer E

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New post 02 Apr 2006, 19:28
yea the answers E... it might help to know everything is a multiple of 0.. :)
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  [#permalink] 02 Apr 2006, 19:28
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If x is a prime number, what is the value of x? 1. x<15

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