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by alltimeacheiver » Fri May 13, 2011 4:56 am
the nos goes down by 15, 7.5, 3.75, 1.5

now I ans choise narrow between b and c so b will be 1.006 and d will be 1.8 so the least is b. tell me where I am wrong. is the sequence will bve followed so c will be the option?
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by Brent@GMATPrepNow » Fri May 13, 2011 7:01 am
alltimeacheiver wrote:the nos goes down by 15, 7.5, 3.75, 1.5
The problem is with 1.5
1.5 isn't half of 3.75

Since the answers are given in fractions, it's best to stick with fractions.

We get: 30, 15, 15/2 (7.5), 15/4 (3.75), 15/8
Since the next number (15/16) is less than 1, the answer must be 15/8

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