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Math Revolution and GMAT Club Contest! A perfect number n is defined

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Bunuel
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Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   06 Dec 2015, 09:37
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A
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E

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55% (hard)

Question Stats:

78% (02:47) correct 22% (01:47) wrong based on 18 sessions
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Math Revolution and GMAT Club Contest Starts!



QUESTION #7:

A perfect number n is defined as the sum of all positive factors of integer n is 2n and also \(f(m)=2^{m-1}(2^m-1)\) is a perfect number, where m is an integer greater than 1. What is the difference of the second perfect number and the third perfect number?

A. 120
B. 92
C. 84
D. 74
E. 28


Check conditions below:


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Math Revolution and GMAT Club Contest

The Contest Starts November 28th in Quant Forum


We are happy to announce a Math Revolution and GMAT Club Contest

For the following four (!) weekends we'll be publishing 4 FRESH math questions per weekend (2 on Saturday and 2 on Sunday).

To participate, you will have to reply with your best answer/solution to the new questions that will be posted on Saturday and Sunday at 9 AM Pacific.
Then a week later, the forum moderator will be selecting 2 winners who provided most correct answers to the questions, along with best solutions. Those winners will get 6-months access to GMAT Club Tests.

PLUS! Based on the answers and solutions for all the questions published during the project ONE user will be awarded with ONE Grand prize:

PS + DS course with 502 videos that is worth $299!



All announcements and winnings are final and no whining :-) GMAT Club reserves the rights to modify the terms of this offer at any time.


NOTE: Test Prep Experts and Tutors are asked not to participate. We would like to have the members maximize their learning and problem solving process.

Thank you!





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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   06 Dec 2015, 13:27
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   06 Dec 2015, 14:15
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   06 Dec 2015, 17:37
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   06 Dec 2015, 17:38
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   06 Dec 2015, 19:04
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   07 Dec 2015, 07:45
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   Updated on: 08 Dec 2015, 20:20
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Originally posted by donkadsw on 07 Dec 2015, 07:58.
Last edited by donkadsw on 08 Dec 2015, 20:20, edited 1 time in total.
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   08 Dec 2015, 04:03
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   08 Dec 2015, 08:54
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   08 Dec 2015, 09:04
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   08 Dec 2015, 13:08
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   09 Dec 2015, 08:49
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   09 Dec 2015, 10:12
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   09 Dec 2015, 12:11
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   12 Dec 2015, 01:03
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Re: Math Revolution and GMAT Club Contest! A perfect number n is defined [#permalink] New post   12 Dec 2015, 04:56
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