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(7.25-1.25)/...

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(7.25-1.25)/...  [#permalink]

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New post Updated on: 14 Feb 2019, 15:55
2
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

93% (01:15) correct 7% (01:34) wrong based on 56 sessions

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[IMAGE with Question is MISSING :( ]

A. 0.75
B 1.5
C. 2.25
D. 3
E. 3.75

Originally posted by avohden on 02 Oct 2013, 15:23.
Last edited by bb on 14 Feb 2019, 15:55, edited 1 time in total.
Note about image
Senior Manager
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User avatar
Status: 1,750 Q's attempted and counting
Affiliations: University of Florida
Joined: 09 Jul 2013
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Location: United States (FL)
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GMAT 1: 600 Q45 V29
GMAT 2: 590 Q35 V35
GMAT 3: 570 Q42 V28
GMAT 4: 610 Q44 V30
GPA: 3.45
WE: Accounting (Accounting)
Re: (7.25-1.25)/...  [#permalink]

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New post 02 Oct 2013, 15:32
1
Official Explanation

Let's take this problem one fraction at a time. Looking at the first fraction, you we can easily simplify the numerator: 7.25 – 1.25 = 6. In the denominator,Image. So Image, and the first fraction is equal to 0.75 (written as a decimal). Now take the second fraction. In the numerator, Image.In the denominator, (3)(4) = 12. So Image , and the second fraction is also equal to 0.75. Looking at the third fraction, remember that Image . So this fraction also equals Image , or 0.75. Adding, 0.75 + 0.75 + 0.75 = 2.25, and the correct answer is thus choice (C).
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Re: (7.25-1.25)/...  [#permalink]

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New post 02 Oct 2013, 19:34
Option C. The provided explanation is correct; Each term simplifies to 3/4 or 0.75 & 3 times 0.75 gives us 2.25 --> Option C
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Re: (7.25-1.25)/...  [#permalink]

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New post 28 Oct 2014, 00:23
Simplifying:

\(\frac{3}{4} + \frac{3}{4} + \frac{3}{4} = \frac{9}{4} = \frac{225}{100} = 2.25\)

Answer = C
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Re: (7.25-1.25)/...  [#permalink]

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New post 29 Oct 2014, 13:19
Just wondering how you guys assumed the square root of the numbers are only positive? Isn't it possible to have a combination of negative roots as well? Thanks!
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Re: (7.25-1.25)/...  [#permalink]

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New post 29 Oct 2014, 21:06
gmatchess wrote:
Just wondering how you guys assumed the square root of the numbers are only positive? Isn't it possible to have a combination of negative roots as well? Thanks!



As far as GMAT is concerned

Root of a "Number" is always +ve i.e. \sqrt{9} = 3

However, \sqrt{X^2} = Mod X = +/- X
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Re: (7.25-1.25)/...  [#permalink]

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New post 30 Oct 2014, 01:57
1
gmatchess wrote:
Just wondering how you guys assumed the square root of the numbers are only positive? Isn't it possible to have a combination of negative roots as well? Thanks!


When the GMAT provides the square root sign for an even root, such as a square root, fourth root, etc. then the only accepted answer is the positive root.

That is:
\(\sqrt{9} = 3\), NOT +3 or -3;
\(\sqrt[4]{16} = 2\), NOT +2 or -2;

Notice that in contrast, the equation \(x^2 = 9\) has TWO solutions, +3 and -3. Because \(x^2 = 9\) means that \(x =-\sqrt{9}=-3\) or \(x=\sqrt{9}=3\).

Hope it's clear.
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(7.25-1.25)/...  [#permalink]

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New post 08 Feb 2019, 23:12
1
avohden wrote:

A. 0.75
B 1.5
C. 2.25
D. 3
E. 3.75


Dear Moderator,
The image in this question is not visible.Hope you will do the needful.Thank you.
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(7.25-1.25)/...   [#permalink] 08 Feb 2019, 23:12
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