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mlane25269
- Master | Next Rank: 500 Posts
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5^21 * (2^2)^11/2=10^n
5^21 * 2 ^ 21=10^n
10^21=10^n
n=21
Hope this helps
cheers
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GMATprep PS question
Source: Beat The GMAT — Problem Solving |
5^21 * 4^11 = 2* 10^n
5^21 * (2^2)^11 = 2* 10^n
5^21 * (2)^22 /2 = 10^n
5^21 * (2)^21 =10^n
10^21 = 10^n
hence n = 21
5^21 * (2^2)^11 = 2* 10^n
5^21 * (2)^22 /2 = 10^n
5^21 * (2)^21 =10^n
10^21 = 10^n
hence n = 21
