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math question

Discussion in 'DAT Discussions' started by Dencology, May 29, 2008.

  1. Dencology

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    guys what is the best approach to these kind of questions: they seem to be very time consuming in terms of dividing my their denominator and see what is larger or smaller, but there got to be a fast way to do this, anyone knows?

    which is the largest of all?

    a. 2/3
    b. 8/11
    c. 10/17
    d. 12/19
    13/21

    ans. B

    the repeating decimal 0.26666... is equal to which of the following?
    a. 8/33
    b. 26/99
    c. 4/15
    d. 13/45
    e. 9/24

    ans. c. what is the fastest way?
     
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  3. userah

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    well i say just from looking at it, you can cancel out c,d and e. they're pretty low fractions and they def won't be over 2/3 (66%) so you just have to divide B and you get .7 something. there's your answer
     
  4. Streetwolf

    Streetwolf Ultra Senior Member
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    Answers in bold.
     
  5. Dencology

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    how do you calculate 6.6/99.
     

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