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Re: GMAT Diagnostic Test Question 6 [#permalink]
15 Dec 2010, 18:35

HanibalSmith wrote:

This may seem like a stupid question but could someone please explain what happend to 1/2^8 * 2^8 in the nominator from the second to third step?

I tried to figure it out myself and looked up the math basics topic but haven't been successful.

Thanks!

well, they cancel each other. Think about a more simple equation. 1/2 *2 = 1 same principle. The numerators multiply together to get 2, and the denominators multiply together to get 2. which 2/2 = 1. all whole numbers can be made into fractions by putting a 1 in the denominator. so 2= 2/1 or in this case 2^8 = (2^8)/1

Re: GMAT Diagnostic Test Question 6 [#permalink]
03 Jan 2011, 18:37

This is a good question, tests basics but offers plenty of opportunities for slipping up to those who arent careful with their working. Guess who fell in that trap? Feel like kicking myself for getting this wrong! _________________

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