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Special Numbers and Sequences Problems

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Special Numbers and Sequences Problems [#permalink]

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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: a-positive-integer-is-called-square-free-if-it-has-no-fact-159462.html

A Sophie Germain prime: a-sophie-germain-prime-is-any-positive-prime-number-p-for-132650.html

A Farey sequence: a-farey-sequence-of-order-n-is-the-sequence-of-fractions-129825.html

A “coprime sequence: an-infi-nite-sequence-of-positive-integers-is-called-a-127496.html

A perfect sequence: an-infinite-sequence-of-positive-integers-is-called-a-127696.html

Twin primes: twin-primes-are-defined-as-prime-numbers-that-can-be-express-128433.html

Length of an integer:

Rhyming primes:

The connection between integers: the-connection-between-any-two-positive-integers-a-and-b-128360.html

Sexy primes: a-pair-of-prime-numbers-that-can-be-expressed-in-the-form-p-174141.html

Alpha sequence: an-infinite-sequence-of-positive-integers-is-called-an-alph-55723.html

Beta sequence: an-infinite-sequence-of-positive-integers-is-called-a-beta-151947.html

A repunit number: a-repunit-is-a-positive-integer-that-contains-only-the-digit-174819.html#p1385302

A “digifac” number: a-number-is-said-to-be-a-digifac-if-each-of-its-digits-is-a-factor-205263.html

A "Pierpont prime": a-pierpont-prime-is-any-prime-number-p-such-that-p-166617.html

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Re: Special Numbers and Sequences Problems [#permalink]

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New post 04 Dec 2016, 08:12
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] 04 Dec 2016, 08:12
    Similar topics Author Replies Last post
2 What will the last number in this sequence? abhik143 7 30 Aug 2016, 06:04
10 Power of a Number in a Factorial Problems Bunuel 2 27 Aug 2016, 00:07
42 Bunuel's Special Problems Collection Gnpth 4 03 Aug 2016, 06:33
3 Experts publish their posts in the topic Number system problems sm021984 4 05 Mar 2016, 19:08
Number Properties Problems needed maheshsrini 1 14 Apr 2011, 05:30
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Special Numbers and Sequences Problems

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