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# Which of the following is closest in value to 9^9 9^2 ? A.

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Manager
Joined: 06 Nov 2008
Posts: 53
Which of the following is closest in value to 9^9 9^2 ? A. [#permalink]

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08 Nov 2008, 20:20
Which of the following is closest in value to 9^9 – 9^2 ?

A. 9^9
B. 9^8
C. 9^7
D. 9^6
E. 9^5

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Manager
Joined: 30 Sep 2008
Posts: 111

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08 Nov 2008, 21:13
$$9^9$$ – $$9^2$$ = $$9^2(9^7 - 1)$$

For (9^7 - 1), we compare if 9^7 is closer or 9^6 is closer

$$|9^7 - 9^7 + 1 | ? |9^6 - 9^7 + 1|$$
=> $$1 < |9^6 - 9^7 + 1|$$

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Re: value---29   [#permalink] 08 Nov 2008, 21:13
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# Which of the following is closest in value to 9^9 9^2 ? A.

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