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

It is currently 15 Oct 2019, 00:18

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

Alejandro calculated 25 percent of x instead of a 25 percent increase

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

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 58339
Alejandro calculated 25 percent of x instead of a 25 percent increase  [#permalink]

Show Tags

New post 28 Feb 2019, 00:05
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

65% (01:12) correct 35% (01:23) wrong based on 53 sessions

HideShow timer Statistics

Alejandro calculated 25 percent of x instead of a 25 percent increase in x. Which of the following operations could Alejandro perform on his answer to produce the correct solution?
Indicate all such values.

I. Add x
II. Divide by 0.25
III. Multiply by 5

A. I only
B. I and II only
C. II and III only
D. I and III only
E. I, II, and III

_________________
Manager
Manager
avatar
B
Joined: 31 Dec 2018
Posts: 115
Location: India
GMAT ToolKit User Premium Member
Re: Alejandro calculated 25 percent of x instead of a 25 percent increase  [#permalink]

Show Tags

New post 28 Feb 2019, 01:09
Wrong Cal=0.25x
Correct Cal=1.25x
Difference=-x
to get same answer, he would have added x to nullify the difference.

Posted from my mobile device
Manager
Manager
avatar
S
Joined: 17 May 2018
Posts: 140
Location: India
Re: Alejandro calculated 25 percent of x instead of a 25 percent increase  [#permalink]

Show Tags

New post 28 Feb 2019, 01:10
Taking x =100
25% of x= 25
125% of x= 125
So the 25% to 125% change can be made by adding x
Or
By multiplying 25% of x with 5

Posted from my mobile device
GMAT Club Legend
GMAT Club Legend
User avatar
D
Joined: 18 Aug 2017
Posts: 4986
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
GMAT ToolKit User Premium Member
Re: Alejandro calculated 25 percent of x instead of a 25 percent increase  [#permalink]

Show Tags

New post 28 Feb 2019, 06:36
let x = 100
so mistake done gets 25 where as it should have been 125

so now he can either add 100 to 25 or multiply by 5
IMO D

Bunuel wrote:
Alejandro calculated 25 percent of x instead of a 25 percent increase in x. Which of the following operations could Alejandro perform on his answer to produce the correct solution?
Indicate all such values.

I. Add x
II. Divide by 0.25
III. Multiply by 5

A. I only
B. I and II only
C. II and III only
D. I and III only
E. I, II, and III
GMAT Club Bot
Re: Alejandro calculated 25 percent of x instead of a 25 percent increase   [#permalink] 28 Feb 2019, 06:36
Display posts from previous: Sort by

Alejandro calculated 25 percent of x instead of a 25 percent increase

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





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