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Picking numers - does it work?

Problem Solving — algebra and arithmetic
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by nehs » Sat Aug 28, 2010 5:44 pm
Does the picking numbers/plugging-in numbers strategy as given for some problem types in Princeton review Cracking the GMAT and Kaplan GMAT work for all problems?
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by sanju09 » Mon Aug 30, 2010 2:37 am
nehs wrote:Does the picking numbers/plugging-in numbers strategy as given for some problem types in Princeton review Cracking the GMAT and Kaplan GMAT work for all problems?
The picking numbers/plugging-in numbers strategy is an indispensable one on GMAT, but never take it as working for all types of problems there. A different problem is designed to test a different concept or strategy than just the picking numbers/plugging-in numbers strategy.
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by Tani » Mon Aug 30, 2010 8:00 am
There are a many occasions when picking numbers works, but it certainly doesn't help in all cases. You should look for problems where there are variables in the answer choices or the question stem and where the problem involves percents but doesn't specify values. Be very sure you are picking numbers that are permissible and manageable and check all the answer choices. Be prepared to pick a second set if your choice produces more than one correct answer.
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by nehs » Mon Aug 30, 2010 11:45 am
Thanks Sanju and Tani. Now, I know :-)
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