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Modulus DS

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Manager
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Modulus DS [#permalink] New post 14 Jul 2006, 14:45
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Whats is the best way to solve modulus problems?

Last edited by rbcola on 29 Jun 2008, 06:43, edited 1 time in total.
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Re: Modulus DS [#permalink] New post 14 Jul 2006, 15:18
rbcola wrote:
Is it true that?
|b-2| + |b+8| = 10

(1) b <= 2
(2) b >= -10


Make sure that st (2) is: b >= - 10

if so, then its C.
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Re: Modulus DS [#permalink] New post 14 Jul 2006, 17:23
rbcola wrote:
Is it true that ?

|b-2| + |b+8| = 10


(1) b<= 2
(2) b >= 10


(1) insuff - could be different values (b = 2 would give 10 but b = -10 would give 14 etc.
(2) suff - since absolute values are +ve, b = 10 (for e.g.) would yield
28 > 10, and any value above 10 would ultimately make it > 10. so we can definitely say it is NOT 10.

(B) SUFF.
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Director
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Re: Modulus DS [#permalink] New post 14 Jul 2006, 17:24
was the question incorrect? if the Q is as posted then I think my answer is right..otherwise if it is as MA posted then it would differ.
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Re: Modulus DS   [#permalink] 14 Jul 2006, 17:24
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