Scoretop 13 - Question 17 - The Beat The GMAT Forum - Expert GMAT Help & MBA Admissions Advice

Scoretop 13 - Question 17

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gmatguy16: Master | Next Rank: 500 Posts; Posts: 124; Joined: Thu Aug 23, 2007 5:11 am; Thanked: 2 times

by gmatguy16 » Fri Sep 28, 2007 7:16 am

imo 8 ..
10 ! is a facctor of 2 ^ 8

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Source: Beat The GMAT — Problem Solving | Fri Sep 28, 2007 7:16 am

kajcha: Master | Next Rank: 500 Posts; Posts: 321; Joined: Tue Aug 28, 2007 5:42 am; Thanked: 1 times

by kajcha » Fri Sep 28, 2007 7:18 am

Write each integer as multiple of 2s

2 = 2*1
4 = 2*2
6 = 2*3
8 = 2*2*2
10 = 2*5

Count 2s now i.e.8

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akay: Senior | Next Rank: 100 Posts; Posts: 53; Joined: Sun May 06, 2007 5:03 am

by akay » Fri Sep 28, 2007 7:22 am

tks for the explanation kajcha. appreciate it.

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