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Manager
Joined: 09 Jun 2010
Posts: 69

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30 Jun 2010, 06:47
1
00:00

Difficulty:

5% (low)

Question Stats:

90% (00:50) correct 10% (00:33) wrong based on 88 sessions

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The product p of two prime no is between 9 and 55 . If one of the prime numbers is greater than 2 but less than 6 and other is greater than 13 but less than 35 then p=
15
33
34
46
51

can anyone explain this with datils start from the basic

thanks

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Manager
Joined: 07 Oct 2006
Posts: 68
Location: India

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30 Jun 2010, 07:31
Let me try to explain this one. I hope you are clear about the prime numbers.
Now, lets take 2 numbers as a and b respectively. Then, as per the statement
9<p<55
2<a<6
13<b<35
Now, a can have values, 3 and 5
b can have values 17, 19, 23...
Now since as per the formula p should be < 55.
Then, only possible values for a and b are 3 and 17 which will give (3*7) = 51.
All other values would be greater than 55. Hence, the answer.
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Manager
Joined: 24 Dec 2009
Posts: 197

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30 Jun 2010, 07:34
Select the least value of prime numbers within the range i.e. 3 and 17.
p = 3 * 17 = 51

Hence the correct answer choice is E.

Thank You.

Thanks,
Akhil M.Parekh
Manager
Joined: 09 Jun 2010
Posts: 69

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30 Jun 2010, 09:14
thank you very much
now I got it
Non-Human User
Joined: 09 Sep 2013
Posts: 7066

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17 Sep 2017, 08:35
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--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________
Re: help   [#permalink] 17 Sep 2017, 08:35
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