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# Tricky Exponents Question

Author Message
Manager
Joined: 03 Jul 2005
Posts: 192
Location: City

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27 Jun 2006, 03:21
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Actual GMAT question

(1/2)^-3 * (1/4)^-2 * (1/16)^-1

A) 1/2^-18
B) 1/2^-11
C) 1/2^-6
D) 1/8^-11
E) 1/8^-6
Manager
Joined: 03 Jul 2005
Posts: 192
Location: City

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27 Jun 2006, 04:03
How did you work it out?

SVP
Joined: 30 Mar 2006
Posts: 1728

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27 Jun 2006, 04:42
B

(1/2)^-3 * (1/4)^-2 * (1/16)^-1

= 2^3 * 4^2 * 16
= 2^3 * 2^4 * 2^4
= 2^ 11
= (1/2)^-11
Manager
Joined: 03 Jul 2005
Posts: 192
Location: City

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27 Jun 2006, 05:12
great thanks, I knew it was that easy!
27 Jun 2006, 05:12
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