GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 21 Sep 2018, 12:43

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

Tom and Samuel are riding motorcycles down the highway at constant

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

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49300
Tom and Samuel are riding motorcycles down the highway at constant  [#permalink]

Show Tags

New post 28 Apr 2017, 03:34
1
3
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

64% (01:05) correct 36% (01:07) wrong based on 109 sessions

HideShow timer Statistics

Tom and Samuel are riding motorcycles down the highway at constant speeds. If Tom is now 2 miles ahead of Samuel, how many minutes before Tom is 3 miles ahead of Samuel?

(1) Tom is traveling at 70 miles per hour and Samuel is traveling at 60 miles per hour.
(2) Tom left 5 minutes before Samuel.

_________________

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:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

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.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

BSchool Forum Moderator
User avatar
V
Joined: 26 Feb 2016
Posts: 3136
Location: India
GPA: 3.12
Premium Member CAT Tests
Tom and Samuel are riding motorcycles down the highway at constant  [#permalink]

Show Tags

New post 28 Apr 2017, 05:03
1
(1) Tom is traveling at 70 miles per hour and Samuel is traveling at 60 miles per hour.

With the above information, we can calculate the relative speed. Therefore, we can find
out how many minutes it would take Tom to go 3 miles ahead (Sufficient)

(2) Tom left 5 minutes before Samuel.

Knowing how much time before Samuel, Tom left is not going to be enough. We also need
to know the speed at which they are travelling. (Insufficient) (Option A)
_________________

You've got what it takes, but it will take everything you've got

CEO
CEO
User avatar
D
Joined: 12 Sep 2015
Posts: 2872
Location: Canada
Re: Tom and Samuel are riding motorcycles down the highway at constant  [#permalink]

Show Tags

New post 18 Mar 2018, 07:53
Top Contributor
1
Bunuel wrote:
Tom and Samuel are riding motorcycles down the highway at constant speeds. If Tom is now 2 miles ahead of Samuel, how many minutes before Tom is 3 miles ahead of Samuel?

(1) Tom is traveling at 70 miles per hour and Samuel is traveling at 60 miles per hour.
(2) Tom left 5 minutes before Samuel.


Target question: How many minutes before Tom is 3 miles ahead of Samuel?

Given: Tom is now 2 miles ahead of Samuel

Statement 1: Tom is traveling at 70 miles per hour and Samuel is traveling at 60 miles per hour.
We don't really need to apply answer formulas here. We need only recognize that, IF we were to reenact this scenario, we would have enough information to answer the target question
Here's what I mean:
Let's go to a stretch of highway and place Tom 2 miles ahead of Samuel (as is given in the question)
3-2-1.....GO! Tell Tom to drive 70 miles per hour and tell Samuel to drive 60 miles per hour
At the same time, start your stopwatch and observe how many minutes it takes Tom to be 3 miles ahead of Samuel
As we can see, this experiment would allow us to answer the target question with certainty
As such, statement 1 is SUFFICIENT

Statement 2: Tom left 5 minutes before Samuel
There are several scenarios that that satisfy statement 2. Here are two:
Case a: Tom's speed is 10 mph and Samuel's speed is 10 mph. In this case, Tom will NEVER be 3 miles ahead of Samuel
Case b: Tom's speed is 1,000,000,000 mph and Samuel's speed is 1 mph. In this case, Tom will be 3 miles ahead of Samuel in less than 1 second
Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT

Answer: A

Cheers,
Brent
_________________

Brent Hanneson – GMATPrepNow.com
Image
Sign up for our free Question of the Day emails

Re: Tom and Samuel are riding motorcycles down the highway at constant &nbs [#permalink] 18 Mar 2018, 07:53
Display posts from previous: Sort by

Tom and Samuel are riding motorcycles down the highway at constant

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

Events & Promotions

PREV
NEXT


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| 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®.