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decimal equivalent

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decimal equivalent

by GmatGreen » Tue Jan 28, 2014 6:56 am
What is the decimal equivalent of (1/5)^5 ?

A) 0.00032
B) 0.0016
C) 0.00625
D) 0.008
E) 0.03125

Can this be done quickly?
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by Patrick_GMATFix » Tue Jan 28, 2014 7:15 am
Realize that 1/5 = 0.2 and that 2^5 = 32, so only answer A makes sense. The full solution below is taken from the GMATFix App.

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by Brent@GMATPrepNow » Tue Jan 28, 2014 7:36 am
GmatGreen wrote:What is the decimal equivalent of (1/5)^5 ?

A) 0.00032
B) 0.0016
C) 0.00625
D) 0.008
E) 0.03125
Patrick's is the fastest approach.

Here's another way:
(1/5)� = (2/10)�
= (2�)/(10�)
= 32/100,000
= 0.00032
= A

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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