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Tricky Exponents Question

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Manager
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Tricky Exponents Question [#permalink] New post 27 Jun 2006, 02:21
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
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Manager
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 [#permalink] New post 27 Jun 2006, 03:03
How did you work it out?

B is the correct answer
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 [#permalink] New post 27 Jun 2006, 03:42
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
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 [#permalink] New post 27 Jun 2006, 04:12
great thanks, I knew it was that easy!
  [#permalink] 27 Jun 2006, 04:12
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