It is currently 15 Dec 2017, 21:37

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

The cost of a phone call is x cents/min for the first 5 minutes

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Manager
Manager
User avatar
B
Joined: 10 Jul 2016
Posts: 54

Kudos [?]: 23 [0], given: 69

Location: India
Concentration: Technology, General Management
WE: Information Technology (Computer Software)
CAT Tests
The cost of a phone call is x cents/min for the first 5 minutes [#permalink]

Show Tags

New post 14 Nov 2017, 11:49
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

63% (02:25) correct 37% (02:08) wrong based on 27 sessions

HideShow timer Statistics

The cost of a phone call is x cents/min for the first 5 minutes and x/2 cents for every additional minute.If Jack paid $1 for a phone call,for how long did he talk?

1. If he had spoken for another minute,he would have paid 10 cents more
2.If he had spoken for one minute fewer,he would have paid 20 cents fewer.

Source: Experts' Global
[Reveal] Spoiler: OA

Kudos [?]: 23 [0], given: 69

1 KUDOS received
BSchool Forum Moderator
User avatar
D
Joined: 26 Feb 2016
Posts: 1708

Kudos [?]: 751 [1], given: 20

Location: India
Concentration: General Management, Leadership
WE: Sales (Retail)
Premium Member CAT Tests
The cost of a phone call is x cents/min for the first 5 minutes [#permalink]

Show Tags

New post 14 Nov 2017, 12:31
1
This post received
KUDOS
1. If Jack had spoken for another minute, he would have paid 10 cents more. This means that he would have spend 10 cents for every additional minute and 20 cents/minute for the initial 5 mins.

Since Jack paid $1 for the phone call, the time spent would be 5 minutes in all (Sufficient)

2. If Jack had spoken for a minute lesser, he would have paid 20 cents fewer. This can happen when he spends 20 cents/minute for the initial 5 mins and one minute lesser will save him 20 cents.

Since Jack paid $1 for the phone call, the time spent on the call would be 5 mins (Sufficient)(Option D)
_________________

Stay hungry, Stay foolish

2017-2018 MBA Deadlines

Class of 2020: Rotman Thread | Schulich Thread
Class of 2019: Sauder Thread

Kudos [?]: 751 [1], given: 20

Intern
Intern
avatar
Joined: 29 Sep 2014
Posts: 15

Kudos [?]: 5 [0], given: 334

Location: United States
Schools: ISB '17 (A), IIMB (I)
GMAT 1: 650 Q49 V30
GMAT 2: 750 Q49 V42
GPA: 3.5
Re: The cost of a phone call is x cents/min for the first 5 minutes [#permalink]

Show Tags

New post 14 Nov 2017, 15:06
Phone call is billed as: x+x+x+x+x+ x/2 + x/2 + ... = 100cents
1. If he had spoken for another minute, he would have paid 10 cents more
If he talked for 1min, x=100. So, 2nd min will be charged at 100, not 10.
If he talked for 2min, 2x=100 => x=50. So, 3rd min will be charged at 50, not 10.
If he talked for 4min, 4x=100 => x=25. So, 5th min will be charged at 25, not 10.
If he talked for 5min, 5x=100 => x=20. So, 6th min will be charged at 20/2 = 10.
Sufficient.

2. If he had spoken for one minute fewer, he would have paid 20 cents fewer.
Working as above, if he talked for 5mins, at 4mins he paid 20 cents fewer.
Sufficient.

Ans: D
_________________

Good luck!

Kudos [?]: 5 [0], given: 334

Re: The cost of a phone call is x cents/min for the first 5 minutes   [#permalink] 14 Nov 2017, 15:06
Display posts from previous: Sort by

The cost of a phone call is x cents/min for the first 5 minutes

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.