Prime Box vs. Venn

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
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Source: — Quantitative Reasoning |

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by Osirus@VeritasPrep » Wed Feb 03, 2010 10:03 am
YOu only use the Venn diagrams when you are attempting to figure out LCM or GCF. If you are dealing with divisibility then use the prime box.

I don't even use the Venn diagram though. With LCM and GCF...I find the methods in one of the advanced chapters more universal (ie: large numbers, numbers with variables, etc)

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by thephoenix » Wed Feb 03, 2010 10:07 am
money9111 wrote:how do you know when you should use a Prime Box vs. a Venn Diagram?
prime box or Venn for two categories
use Venn for>2 categories
for < two
use the with which u can frame a eqn easily

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by money9111 » Wed Feb 03, 2010 10:53 am
osirus0830 I haven't gotten that far yet... but as long as I can hone in on these skills now.. i'll be able to understand the advanced skills later ;-)
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