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M13-31

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Manager
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Joined: 18 May 2012
Posts: 53
Concentration: Finance, Marketing
Schools: Sloan '17 (S)
GMAT 1: 600 Q47 V25
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GMAT 3: 750 Q50 V41
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M13-31 [#permalink] New post 06 Jun 2013, 02:41
If function ROUND(x) rounds x to the nearest integer while function TRUNC(x) truncates x to the largest integer less than x , what is ROUND(2.501)−TRUNC(−1.8)−TRUNC(−0.25) ?

A) 2
B) 3
C) 4
D) 5
E) 6

what should be value of trunc(-0.25) .. Please justify
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Re: M13-31 [#permalink] New post 06 Jun 2013, 02:49
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rohanGmat wrote:
If function ROUND(x) rounds x to the nearest integer while function TRUNC(x) truncates x to the largest integer less than x , what is ROUND(2.501)−TRUNC(−1.8)−TRUNC(−0.25) ?

A) 2
B) 3
C) 4
D) 5
E) 6

what should be value of trunc(-0.25) .. Please justify


ROUND(2.501) = 3, since 3 is the the nearest integer to 2.501;
TRUNC(-1.8) = -2, since -2 is the largest integer less than -1.8;
TRUNC(-0.25) = -1, since -1 is the largest integer less than -0.25.

ROUND(2.501) - TRUNC(-1.8) - TRUNC(-0.25) = 3 - (-2) - (-1) = 6.

Answer: E.

Hope it's clear.
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Manager
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Re: M13-31 [#permalink] New post 25 Mar 2014, 05:32
Bunuel, truncate means "cut" the excess digits, not round. I think it would be more correct if TRUNC "rounded down" to the nearest integer.
Manager
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Joined: 18 May 2012
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Concentration: Finance, Marketing
Schools: Sloan '17 (S)
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GMAT 3: 750 Q50 V41
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Kudos [?]: 55 [0], given: 16

Re: M13-31 [#permalink] New post 25 Mar 2014, 08:03
Thanks Brunel .. I didnt see this post for a while..

- Your questions and GC-tests were instrumental in my preparation for the gmat, and really helped me get my dream score.. You guys rock!!
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Re: M13-31   [#permalink] 25 Mar 2014, 08:03
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