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Re: Number props DS [#permalink]
09 Aug 2011, 21:04

ruturaj wrote:

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

(1) There are a total of 50 prime numbers between 2 and x, inclusive. (2) There is no integer n such that x is divisible by n and 1 < n< x.

From 1, x can be identified. Sufficient. From 2, x is not 2 but could be any prime > 2. No prime is divisible by n given that 1 < n< x. (statement 2 is not much clear for me. May be its a long brake for me).

Re: Number props DS [#permalink]
09 Aug 2011, 23:16

Fistail wrote:

ruturaj wrote:

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

(1) There are a total of 50 prime numbers between 2 and x, inclusive. (2) There is no integer n such that x is divisible by n and 1 < n< x.

From 1, x can be identified. Sufficient. From 2, x is not 2 but could be any prime > 2. No prime is divisible by n given that 1 < n< x. (statement 2 is not much clear for me. May be its a long brake for me).

So it should be A.

Please explain how 1 is sufficient..please explain with steps..

Re: Number props DS [#permalink]
10 Aug 2011, 10:05

ruturaj wrote:

Fistail wrote:

ruturaj wrote:

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

(1) There are a total of 50 prime numbers between 2 and x, inclusive. (2) There is no integer n such that x is divisible by n and 1 < n< x.

From 1, x can be identified. Sufficient. From 2, x is not 2 but could be any prime > 2. No prime is divisible by n given that 1 < n< x. (statement 2 is not much clear for me. May be its a long brake for me).

So it should be A.

Please explain how 1 is sufficient..please explain with steps..

(1) If there are a total of 50 prime numbers between 2 and x, inclusive, then prime numbers are p1 (which is 2), p2 (=3), p3 (=5), ....... p50 (=x). So x = p50. sufficient.

However the question is what is x? But we do not need to answer what exactly is x. What we need is whether statement 1 is sufficient to answer the question or not. That's sufficient.

Helpful Geometry formula sheet:best-geometry-93676.html I hope these will help to understand the basic concepts & strategies. Please Click ON KUDOS Button.

Re: If x is a prime number, what is the value of x? (1) There [#permalink]
25 Nov 2013, 20:36

Expert's post

monirjewel wrote:

stm2 is not clear to me. Can anyone provide better explanation. thanks

F.S 2 states that "There is no integer n such that x is divisible by n and 1 < n< x."

In other words, it means that for the integer x,there is no other factor of x which is greater than 1 and less than x.

For example, take x=4. We have n=2, where 4 is divisible by 2, and 1<2<4.

But, for x=5,we have no value of 'n', which will be less than 5 and greater than 1.Thus, statement 2 basically means to say that x is a prime integer, which we already know.Insufficient.