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

 It is currently 19 Oct 2019, 03:24

### 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

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

# A man is a climbing up a 100-foot high mountain. Each day he climbs 30

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 58449
A man is a climbing up a 100-foot high mountain. Each day he climbs 30  [#permalink]

### Show Tags

10 Apr 2017, 02:23
00:00

Difficulty:

35% (medium)

Question Stats:

63% (01:04) correct 37% (00:56) wrong based on 76 sessions

### HideShow timer Statistics

A man is a climbing up a 100-foot high mountain. Each day he climbs 30 feet but then falls 20 feet. How long does it take him to reach the top assuming that once he reaches the top he does not fall?

A. 7
B. 8
C. 9
D. 10
E. 11

_________________
Intern
Joined: 04 Oct 2015
Posts: 4
Location: France
Re: A man is a climbing up a 100-foot high mountain. Each day he climbs 30  [#permalink]

### Show Tags

10 Apr 2017, 03:58
1
I started by considering that in the last day he will climb 30ft without falling back, which means that if he arrives at 70ft than it will take one more day to reach the top.
Hence, since he climbs at a "net" ratio of 10ft/day, it will take him 7 days to reach the 70ft mark, and one more day to reach the top. Therefore, it'll take him 8 days to reach the top.
So, IMO the answer should be B.
Board of Directors
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 4772
Location: India
GPA: 3.5
Re: A man is a climbing up a 100-foot high mountain. Each day he climbs 30  [#permalink]

### Show Tags

10 Apr 2017, 11:56
1
Bunuel wrote:
A man is a climbing up a 100-foot high mountain. Each day he climbs 30 feet but then falls 20 feet. How long does it take him to reach the top assuming that once he reaches the top he does not fall?

A. 7
B. 8
C. 9
D. 10
E. 11

Day 1 = 30 ft - 20 ft = 10 ft rise
Day 2 = 40 ft - 20 ft = 20 ft rise
Day 3 = 50 ft - 20 ft = 30 ft rise
Day 4 = 60 ft - 20 ft = 40 ft rise
Day 5 = 70 ft - 20 ft = 50 ft rise
Day 6 = 80 ft - 20 ft = 60 ft rise
Day 7 = 90 ft - 20 ft = 70 ft rise
Day 8 = 100 ft

Thus, the man will reach 100 ft mountain in 8th day....

Hence, answer will be (B) 8th day..
_________________
Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )
CEO
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2978
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Re: A man is a climbing up a 100-foot high mountain. Each day he climbs 30  [#permalink]

### Show Tags

10 Apr 2017, 19:22
1
Bunuel wrote:
A man is a climbing up a 100-foot high mountain. Each day he climbs 30 feet but then falls 20 feet. How long does it take him to reach the top assuming that once he reaches the top he does not fall?

A. 7
B. 8
C. 9
D. 10
E. 11

Net rise in height climbed in 1 days = 30-20 = 10 feet

Hence, man will attain height of 70 in = 7 days

Remaining 30 feet will be climbed by man in just 1 days

So total days to rise 100 feet = 7+1 = 8 days

_________________
Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION
Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 8109
Location: United States (CA)
Re: A man is a climbing up a 100-foot high mountain. Each day he climbs 30  [#permalink]

### Show Tags

13 Mar 2018, 17:06
1
Bunuel wrote:
A man is a climbing up a 100-foot high mountain. Each day he climbs 30 feet but then falls 20 feet. How long does it take him to reach the top assuming that once he reaches the top he does not fall?

A. 7
B. 8
C. 9
D. 10
E. 11

Notice that on the last day, he will not fall. So on the last day he will climb 30 feet, which means he has 70 feet to climb before the last day. For those 70 feet, each day the man climbs a net distance of 30 - 20 = 10 feet, so it will take 70/10 = 7 days to climb those 70 feet. Since he needs one more day to climb the last 30 feet, he needs a total of 8 days to climb to the top.

_________________

# Scott Woodbury-Stewart

Founder and CEO

Scott@TargetTestPrep.com
122 Reviews

5-star rated online GMAT quant
self study course

See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews

If you find one of my posts helpful, please take a moment to click on the "Kudos" button.

Re: A man is a climbing up a 100-foot high mountain. Each day he climbs 30   [#permalink] 13 Mar 2018, 17:06
Display posts from previous: Sort by