GMAT Prep
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Hi, I'd really appreciate it if you can explain how you get 2^13(4-1)sujaysolanki wrote:Picking numbers is best here
say x =15
2^15 - 2^13 = 2^13(4-1) = 2^13(3)
Hence D
Thanks a lot
Sonia
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- Senior | Next Rank: 100 Posts
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THANK YOU SO MUCH!!!!! I FINALLY GET IT!cris wrote:[(2^x)]-[(2^x)/(2^2)] = (2^x) (3/4)
and we know:
(2^x)(3/4)= (2^13) (3)
x must be 15
I think this way is faster