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What is the ratio of 2^(-16) + 2^(-17) + 2^(-18) + 2^(-19)/5/4 to 2^(-

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What is the ratio of 2^(-16) + 2^(-17) + 2^(-18) + 2^(-19)/5/4 to 2^(-  [#permalink]

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New post 24 Apr 2018, 22:03
00:00
A
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C
D
E

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Question Stats:

82% (01:42) correct 18% (02:37) wrong based on 87 sessions

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What is the ratio of \(\frac{2^{(-16)} + 2^{(-17)} + 2^{(-18)} + 2^{(-19)}}{\frac{5}{4}}\) to \(2^{(-17)}\)?

(A) 3 to 2
(B) 5 to 2
(C) 3 to 1
(D) 4 to 1
(E) 5 to 1

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Re: What is the ratio of 2^(-16) + 2^(-17) + 2^(-18) + 2^(-19)/5/4 to 2^(-  [#permalink]

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New post 24 Apr 2018, 22:06
Bunuel wrote:
What is the ratio of \(\frac{2^{(-16)} + 2^{(-17)} + 2^{(-18)} + 2^{(-19)}}{\frac{5}{4}}\) to \(2^{(-17)}\)?

(A) 3 to 2
(B) 5 to 2
(C) 3 to 1
(D) 4 to 1
(E) 5 to 1


Similar question to practice: https://gmatclub.com/forum/the-value-of ... 30682.html
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
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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: What is the ratio of 2^(-16) + 2^(-17) + 2^(-18) + 2^(-19)/5/4 to 2^(-  [#permalink]

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New post 24 Apr 2018, 22:22
((2^(-19)(2^3+2^2+2+1))/5/4)/ 2^(-17)
=2^(-17)(15)/5/ 2^(-17)
=3/1
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Re: What is the ratio of 2^(-16) + 2^(-17) + 2^(-18) + 2^(-19)/5/4 to 2^(-  [#permalink]

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New post 29 Sep 2018, 07:54
1
Bunuel wrote:
What is the ratio of \(\frac{2^{(-16)} + 2^{(-17)} + 2^{(-18)} + 2^{(-19)}}{\frac{5}{4}}\) to \(2^{(-17)}\)?

(A) 3 to 2
(B) 5 to 2
(C) 3 to 1
(D) 4 to 1
(E) 5 to 1


Here, this is how I did it.

Ans is 3 to 1 (C)
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Re: What is the ratio of 2^(-16) + 2^(-17) + 2^(-18) + 2^(-19)/5/4 to 2^(- &nbs [#permalink] 29 Sep 2018, 07:54
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