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M01-26

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New post 17 Oct 2017, 05:36
I think this is a high-quality question and I agree with explanation.
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Re: M01-26  [#permalink]

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New post 21 Nov 2017, 05:07
"Statement (2) by itself is not sufficient. The product of two integers can be prime only if one integer is a prime and the other integer is 1. For example 3=1∗33=1∗3 is prime, but 6=3∗26=3∗2 is not prime."

I don't get this. 2 should be sufficient because only primes are a product of 2 integers. 6 as shown in the example above is a product of 3 integers 3,2, and 1.
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Re: M01-26  [#permalink]

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New post 21 Nov 2017, 07:30
adityabajaj92 wrote:
"Statement (2) by itself is not sufficient. The product of two integers can be prime only if one integer is a prime and the other integer is 1. For example 3=1∗33=1∗3 is prime, but 6=3∗26=3∗2 is not prime."

I don't get this. 2 should be sufficient because only primes are a product of 2 integers. 6 as shown in the example above is a product of 3 integers 3,2, and 1.


x is a product of two integers means that x can be represented as the product of two integers.
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Re: M01-26  [#permalink]

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New post 05 Mar 2018, 03:06
Hi Bunuel,

For statement 2...I got insufficient by seeing that x could be prime i.e. x=2 is 1*2
Then x is not prime by x=0 so 0*any number = 0. Instead of using x=6 (2*3)

Since x is an integer...this approach is also correct right?

I guess I got it wrong by going for C since 0 was not in statement 2...knowing that c could have been 6 in statement 2 would've helped to get the right answer E.

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Re: M01-26  [#permalink]

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New post 13 Mar 2018, 18:55
(1) x is a multiple of a prime number - Multiple of a prime number can be a prime number and also not a prime number - Not sufficient.

(2) x is a product of 2 integers - Product of 2 integers can be 7*1 (prime number) or 7*9 (Not a prime number)

Both the statement is not sufficient.

Ans: E
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M01-26  [#permalink]

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New post 13 Jun 2018, 10:51
I think this is a high-quality question and I don't agree with the explanation.
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New post 03 Sep 2018, 14:02
I think both 1 and 2 are sufficient to say x can be prime or not.
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M01-26  [#permalink]

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New post 12 Oct 2018, 00:31
Hi,

I read the explanation provided for this question. However I am still not sure of the explanation provided for the question below.
If prime numbers are product of 2 integers, the all other numbers expect 0, 1 and prime should be product of atleast 3 integers.


And if the number is product of just 2 integers it should be a prime number.


Please correct me.


Thanks,
Sonal

Hello Bunuel

Need a clarification here.

I am still confused about the statement 2.
Product of TWO integers: 3*1
Product of THREE integers: 1*3*2= 6 (one is a factor of 3 as well)

Statement 2 should be sufficient according to the above analysis because ONLY PRIME NUMBERS HAVE TWO FACTORS (ONE AND ITSELF).

Please clarify.

Thanks.
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Re: M01-26  [#permalink]

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New post 31 Oct 2018, 03:08
Isn't the options giving answer that x is NOT a prime number, as
1) multiple of prime number= so x cannot be prime number
2) Product of two integers= again it cannot be prime number.

so both the options are sufficient to prove that x is NOT a prime number, or in such question do we look for options which proves it right or gives a YES?

please explain.

Thanks.
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New post 07 Dec 2018, 23:32
Are there any actual GMAT questions that test this concept, or is this a complete waste of time for me to focus on?
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Re M01-26  [#permalink]

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New post 18 Feb 2019, 10:32
I think this is a poor-quality question and I agree with explanation. "x is a product of two integers" is ambiguous.
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M01-26  [#permalink]

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New post 20 Jun 2019, 03:59
Such a SLY one! :shocked

(1) x is a multiple of "a" prime number NOT x is a multiples of prime numbers,
in this case,
it is X = n * prime number , and that can be EITHER 1*prime = prime, OR prime * prime != prime
Therefore, I is insufficient :facepalm:

*!= , not equal
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Re: M01-26  [#permalink]

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New post 02 Sep 2019, 06:26
for statement 2- X is a product of two integers
But prime factors can have only two factors, One the no itself and the other '1'

why two alone is not sufficient?
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Re: M01-26   [#permalink] 02 Sep 2019, 06:26

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