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by baller12q » Sat Mar 28, 2009 6:46 pm
If m = 9/25, w = 15/32, and m+w+c=1, which of the following gives the values of m,w,and c in increasing order
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by vittalgmat » Sat Mar 28, 2009 8:52 pm
Looks like an incomplete question.
Can u pls post the choices.

thanks
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by gmat740 » Sat Mar 28, 2009 8:54 pm
its purely calculative

May be I can give you some tricks for fast calculations:

we have m+w+c=1

9/25 +15/32 +c =1

663/800 + c = 1 [solving by taking LCM]

c = 1- 663/800

c= 137/800

When we have to compare numbers with different denominators(Dr'), we make there Drs' equal just for sake of comparison


so m = 9/25
Multiply by 4 both numerator (Nr') and Dr'
m = 36/100

Further multiply by 8 both Nr' and Dr' as we have the max Dr' as 800

m= 288/800

Similarly w = 15/32
Multiply Nr' and Dr' By 25

w =375/800

c= 137/800


So C> M > W


How to make paced calculation in Question like this,I will post a new topic.
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by gmat740 » Sat Mar 28, 2009 9:36 pm
For speed calculations

Check this Out:

https://www.beatthegmat.com/speed-calcul ... tml#136598
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by crackthetest » Sun Nov 15, 2009 7:59 pm
Here the answer should be:

C < M < W

greater the numerator => greater the fraction.
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by Ian Stewart » Mon Nov 16, 2009 2:18 am
baller12q wrote:If m = 9/25, w = 15/32, and m+w+c=1, which of the following gives the values of m,w,and c in increasing order
w is just less than 16/32 = 1/2 = 0.5, while m is 0.36. Since m+w+c = 1, c must be very close to zero (using our estimate of w, c is close to 0.14 in value), and c < m < w.
For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

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by goyalsau » Fri Oct 01, 2010 10:56 pm
Ian Stewart wrote:
baller12q wrote:If m = 9/25, w = 15/32, and m+w+c=1, which of the following gives the values of m,w,and c in increasing order
w is just less than 16/32 = 1/2 = 0.5, while m is 0.36. Since m+w+c = 1, c must be very close to zero (using our estimate of w, c is close to 0.14 in value), and c < m < w.
Awesome
No calculation is required at all.
just pure common sense.
Stewart you ROCK.
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