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    Re: An “Armstrong number”

    1,6k4 is a 4-digit number.
    So, 1^4 + 6^4 + k^4 + 4^4 = 16k4
    Evaluate: 1 + 1296 + k^4 + 256 = 16k4
    Simplify: 1553 + k^4 = 16k4

    Whatever k is, it must be the case that the UNITS digit of k^4 is...
  2. Re: In performing a sequence of experiments

    A quick solution is to say that the original 20 measurements were all 34
    That is {34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34}
    These values definitely have an...
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    Re: Geometry

    There's no math required for this question.
    The strip can be any value, since we could choose a certain width for the strip and then just shrink or expand the inlay until the ratio of (inlay area):...
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    Re: Manhattan 5lb divisibility and primes

    Another way to state this question is: What is the greatest common factor of 4000 and 180?
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    Re: Logical Reasoning

    G = 10^100
    We can rewrite this as follows: G = (10^3)(10^97)
    Or we can say G = (1000)(10^97)


    So, G/8 = (1000)(10^97)/8 = (125)(10^97)
    G/5 = (1000)(10^97)/5 = (200)(10^97)
    G/4 =...
  6. Re: Best GRE study guide? I really liked my math lab with how to and then sample prob

    We have an online study guide here - Study Guide - Overview | Greenlight Test Prep Online Course
    It can be used in conjunction with our free GRE video course.

    Cheers,
    Brent
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    Re: Help me with this probablity problem

    You will notice that I never said that 12 people can be seated at a round table in 11! ways (Chromepal made this claim). I'm not a big fan of "people sitting at a circle" questions, because the...
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    Re: Help with a little arithmetic problem

    When it comes to remainders, we have a nice rule that says:

    If N divided by D, leaves remainder R, then the possible values of N are R, R+D, R+2D, R+3D,. . . etc.
    For example, if k divided...
  9. 175 Interactive Flashcards for GRE Math

    175 flashcards covering every formula, concept and strategy needed for the quantitative sections of the GRE. Each flashcard is linked to a corresponding video lesson from Greenlight Test Prep’s free...
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    Re: GRE preparation: is MAGOOSH BEST??

    If you're still looking for GRE resources, we have a free course with 500+ videos, 600+ practice questions and 5 full-length practice tests.

    Cheers,
    Brent - Greenlight Test Prep
  11. Thread: Problem

    by Brent Hanneson
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    Re: Problem

    You're absolutely correct - nice catch!

    I have reposted my answer above.

    Cheers,
    Brent
  12. Thread: Problem

    by Brent Hanneson
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    Re: Problem

    Let's examine the two EXTREME values of a.

    Case a: The GREATEST value of a
    If the values are strictly increasing (i.e., no values are equal), them a could be a little bit smaller than 8.5.
    So,...
  13. Re: Few Problems on Mixtures that I am looking for help!

    Please post only one question per thread. Otherwise things can become pretty complicated when there are discussions on multiple questions.

    Cheers,
    Brent
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    Re: Combinatorics - Counting

    Way out of scope for the GRE.

    Cheers,
    Brent - Greenlight Test Prep
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    Re: Probability question. Pls try

    Oops - please ignore :-)
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