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What is the product of two prime numbers X and Y? (1) Sum of X and Y

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Digvijay101
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Re: What is the product of two prime numbers X and Y? (1) Sum of X and Y [#permalink] New post   08 Apr 2018, 11:38
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83% (01:03) correct 17% (01:25) wrong based on 53 sessions
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amanvermagmat wrote:
What is the product of two prime numbers X and Y, which are both two-digit numbers?

(1) Sum of X and Y is 28.

(2) Both X and Y are greater than 7.


Using Statement 1-
Two digit prime numbers- 11,13,15,17
Now 11+17=28
Therefore X & Y are 11 & 17, product= 11*17=187
Sufficient

Statement 2 is redundant as we already know that X & Y are greater than 7

Answer- A
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Re: What is the product of two prime numbers X and Y? (1) Sum of X and Y [#permalink] New post   15 Sep 2018, 18:44
Digvijay101 wrote:
amanvermagmat wrote:
What is the product of two prime numbers X and Y, which are both two-digit numbers?

(1) Sum of X and Y is 28.

(2) Both X and Y are greater than 7.



X * Y = ?


(1) Sum of X and Y is 28.

X + Y = 28.

X and Y have to both be prime and both be two digit numbers. 11 and 17 are the only prime, double digit numbers that add to 28.

Sufficient


(2) Both X and Y are greater than 7.

We already know X and Y are prime and double digit, so this does not give us any additional information.

Not Sufficient

Answer: A
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ArjunJag1328
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Re: What is the product of two prime numbers X and Y? (1) Sum of X and Y [#permalink] New post   17 Sep 2018, 05:28
What is the product of two prime numbers X and Y, which are both two-digit numbers?

(1) Sum of X and Y is 28.

(2) Both X and Y are greater than 7.

Question is not clear! if one assumes that question is dealing only with 2 digit prime numbers, then answer is A otherwise answer would be C.

Thank you
Arjun
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MikeScarn
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What is the product of two prime numbers X and Y? (1) Sum of X and Y [#permalink] New post   17 Sep 2018, 05:41
ArjunJag1328 wrote:
What is the product of two prime numbers X and Y, which are both two-digit numbers?

(1) Sum of X and Y is 28.

(2) Both X and Y are greater than 7.

Question is not clear! if one assumes that question is dealing only with 2 digit prime numbers, then answer is A otherwise answer would be C.

Thank you
Arjun


You are correct that the answer is A. The question actually is clear, but I could see how it could be misunderstood.

The question tells us that X and Y are both prime numbers and are both two digit numbers. The question then asks us what the product is of X and Y.

Hope this clears it up!
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ArjunJag1328
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Re: What is the product of two prime numbers X and Y? (1) Sum of X and Y [#permalink] New post   17 Sep 2018, 05:48
MikeScarn wrote:
ArjunJag1328 wrote:
What is the product of two prime numbers X and Y, which are both two-digit numbers?

(1) Sum of X and Y is 28.

(2) Both X and Y are greater than 7.

Question is not clear! if one assumes that question is dealing only with 2 digit prime numbers, then answer is A otherwise answer would be C.

Thank you
Arjun


You are correct that the answer is A. The question actually is clear, but I could see how it could be misunderstood.

The question tells us that X and Y are both prime numbers and are both two digit numbers. The question then asks us what the product is of X and Y.

Hope this clears it up!



I got your point but do you think GMAT would come up with such questions that create confusion to a test taker? if yes, I should better improve the way I analyse these type of wordy questions.
:shh:
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Re: What is the product of two prime numbers X and Y? (1) Sum of X and Y [#permalink] New post   17 Sep 2018, 05:51
ArjunJag1328 wrote:
MikeScarn wrote:
ArjunJag1328 wrote:
What is the product of two prime numbers X and Y, which are both two-digit numbers?

(1) Sum of X and Y is 28.

(2) Both X and Y are greater than 7.

Question is not clear! if one assumes that question is dealing only with 2 digit prime numbers, then answer is A otherwise answer would be C.

Thank you
Arjun


You are correct that the answer is A. The question actually is clear, but I could see how it could be misunderstood.

The question tells us that X and Y are both prime numbers and are both two digit numbers. The question then asks us what the product is of X and Y.

Hope this clears it up!



I got your point but do you think GMAT would come up with such questions that create confusion to a test taker? if yes, I should better improve the way I analyse these type of wordy questions.
:shh:


It's important to be able to understand what the question is asking. I'm not sure the source of this problem, but try to stick to OG questions. If you don't have trouble with the sentences from OG questions, then you should be fine.
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Re: What is the product of two prime numbers X and Y? (1) Sum of X and Y [#permalink]
17 Sep 2018, 05:51
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