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1/(3-1/(3-1/(3-1)))=

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1/(3-1/(3-1/(3-1)))=  [#permalink]

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New post 24 Jan 2014, 04:01
1
2
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

92% (00:51) correct 8% (01:12) wrong based on 732 sessions

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The Official Guide For GMAT® Quantitative Review, 2ND Edition

\(\frac{1}{3-\frac{1}{3-\frac{1}{3-1}}}=\)

(A) 7/23
(B) 5/13
(C) 2/3
(D) 23/7
(E) 13/5

Problem Solving
Question: 60
Category: Arithmetic Operations with rational numbers
Page: 69
Difficulty: 600


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Re: 1/(3-1/(3-1/(3-1)))=  [#permalink]

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New post 24 Jan 2014, 04:01
SOLUTION

\(\frac{1}{3-\frac{1}{3-\frac{1}{3-1}}}=\)

(A) 7/23
(B) 5/13
(C) 2/3
(D) 23/7
(E) 13/5

\(\frac{1}{3-\frac{1}{3-\frac{1}{3-1}}}=\frac{1}{3-\frac{1}{3-\frac{1}{2}}}=\frac{1}{3-\frac{2}{5}}=\frac{5}{13}\).

Answer: B.
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Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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Re: 1/(3-1/(3-1/(3-1)))=  [#permalink]

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New post 24 Jan 2014, 05:40
2
3 - 1/2 = 5/2
3 - 2/5 = 13/5

We flip it one more time to 5/13. So (B)?
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Re: 1/(3-1/(3-1/(3-1)))=  [#permalink]

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New post 14 Aug 2017, 15:23
Bunuel wrote:
The Official Guide For GMAT® Quantitative Review, 2ND Edition

\(\frac{1}{3-\frac{1}{3-\frac{1}{3-1}}}=\)

(A) 7/23
(B) 5/13
(C) 2/3
(D) 23/7
(E) 13/5


We can simplify the given fraction:

1/[3 - (1/(3 - 1/2)]

1/[3 - (1/(6/2 - 1/2)]

1/[3 - 1/(5/2)]

1/[3 - 2/5]

1/[15/5 - 2/5]

1/[13/5] = 5/13

Answer: B
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Re: 1/(3-1/(3-1/(3-1)))= &nbs [#permalink] 14 Aug 2017, 15:23
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