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# What is the value of (c + d)/(c - d)?

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Math Expert
Joined: 02 Sep 2009
Posts: 58347
What is the value of (c + d)/(c - d)?  [#permalink]

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03 Apr 2018, 21:53
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Difficulty:

15% (low)

Question Stats:

93% (01:15) correct 7% (01:32) wrong based on 63 sessions

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What is the value of $$\frac{c + d}{c - d}$$?

(1) The ratio of c to d is 5 to 1.

(2) $$1 < \frac{c + d}{c - d} < 2$$

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Joined: 05 Feb 2016
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Location: India
Concentration: General Management, Marketing
WE: Information Technology (Computer Software)
What is the value of (c + d)/(c - d)?  [#permalink]

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04 Apr 2018, 00:32
Bunuel wrote:
What is the value of $$\frac{c + d}{c - d}$$?

(1) The ratio of c to d is 5 to 1.

(2) $$1 < \frac{c + d}{c - d} < 2$$

from1: $$\frac{c}{d}=\frac{5}{1}$$------->1
dividing by d in num and denom

new eq
$$(\frac{c}{d}+ 1)/(\frac{c}{d} -1)$$-------->2

inserting eq 1 value in eq 2 we will get the ratio.

sufficient

from2:
there can be multiple values :insufficient.

A
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GMAT 1: 710 Q49 V36
Re: What is the value of (c + d)/(c - d)?  [#permalink]

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04 Apr 2018, 00:36
Bunuel wrote:
What is the value of $$\frac{c + d}{c - d}$$?

(1) The ratio of c to d is 5 to 1.

(2) $$1 < \frac{c + d}{c - d} < 2$$

c/d=5/1

c=5d

1 is sufficient

2 is insufficient as the value can be anything

(A) imo
Intern
Joined: 31 Jan 2018
Posts: 1
Re: What is the value of (c + d)/(c - d)?  [#permalink]

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04 Apr 2018, 04:48
1) c/d=5/1 hence (5x+x)/(5x-x)=6x/4x => 3/2 SUFF.
2) 1<(c+d)/(c-d)<2 does not give us any specifics, INSUFF
Re: What is the value of (c + d)/(c - d)?   [#permalink] 04 Apr 2018, 04:48
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