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# Special Numbers and Sequences Problems

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Math Expert
Joined: 02 Sep 2009
Posts: 64134
Special Numbers and Sequences Problems  [#permalink]

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24 Jul 2014, 06:35
4
20

SPECIAL NUMBERS AND SEQUENCES

 ! This post is a part of the Special Questions Directory focusing on Quant topics traditionally neglected and not covered by conventional sources but still tested on the GMAT. Many of these are above average difficulty questions

Questions about special numbers and sequences. Note that you do NOT need to know or study these numbers or sequences in advance, the questions themselves will contain their definition. If you encounter such kind of questions, read the definition carefully and don't be confused by weird numbers/sequences described there.

A square-free integer: http://gmatclub.com/forum/a-positive-in ... 59462.html

A Sophie Germain prime: http://gmatclub.com/forum/a-sophie-germ ... 32650.html

A Farey sequence: http://gmatclub.com/forum/a-farey-seque ... 29825.html

A coprime sequence: http://gmatclub.com/forum/an-infi-nite- ... 27496.html

A perfect sequence: http://gmatclub.com/forum/an-infinite-s ... 27696.html

Twin primes: http://gmatclub.com/forum/twin-primes-a ... 28433.html

Length of an integer:
http://gmatclub.com/forum/for-any-posit ... 26368.html
http://gmatclub.com/forum/for-any-integ ... 08124.html
http://gmatclub.com/forum/for-any-posit ... 26740.html

Rhyming primes:
http://gmatclub.com/forum/two-different ... 28903.html

The connection between integers: http://gmatclub.com/forum/the-connectio ... 28360.html

Sexy primes: http://gmatclub.com/forum/a-pair-of-pri ... 74141.html

Alpha sequence: http://gmatclub.com/forum/an-infinite-s ... 55723.html

Beta sequence: http://gmatclub.com/forum/an-infinite-s ... 51947.html

A repunit number: http://gmatclub.com/forum/a-repunit-is- ... l#p1385302

A “digifac” number: http://gmatclub.com/forum/a-number-is-s ... 05263.html

A "Pierpont prime": http://gmatclub.com/forum/a-pierpont-pr ... 66617.html
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Joined: 18 May 2016
Posts: 10
Re: Special Numbers and Sequences Problems  [#permalink]

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15 Feb 2018, 21:24
Bunuel

Rhyming prime examples both point to the same link

Thanks
Prathamesh
Math Expert
Joined: 02 Sep 2009
Posts: 64134
Re: Special Numbers and Sequences Problems  [#permalink]

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15 Feb 2018, 22:19
ppnimkar wrote:
Bunuel

Rhyming prime examples both point to the same link

Thanks
Prathamesh

Yes, there is only one question. Removed duplicate link.
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Posts: 14975
Re: Special Numbers and Sequences Problems  [#permalink]

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26 Jun 2019, 03:40
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Special Numbers and Sequences Problems   [#permalink] 26 Jun 2019, 03:40