Last visit was: 26 Apr 2026, 21:18 It is currently 26 Apr 2026, 21:18
Home
Messages
Tests
Schools
Events
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
Back to Forum
Create Topic
User avatar
DeeptiM
User avatar
Joined: 16 Feb 2011
Last visit: 01 Mar 2012
Posts: 141
Own Kudos:
1,294
 [1]
Given Kudos: 9
Posts: 141
Kudos: 1,294
 [1]
Someone invested x dollars at simple annual interest, and the investme 27 Aug 2011, 00:07
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

(N/A)

Question Stats:

100% (00:00) correct 0% (00:00) wrong based on 13 sessions

History

Date
Time
Result
Not Attempted Yet
Someone invested x dollars at simple annual interest, and the investment, including interest will be doubled in 8 and 1/3 years. What will be the total amount of the investment after 25 years?
User avatar
fluke
User avatar
Retired Moderator
Joined: 20 Dec 2010
Last visit: 24 Oct 2013
Posts: 1,095
Own Kudos:
5,169
Given Kudos: 376
Posts: 1,095
Kudos: 5,169
Someone invested x dollars at simple annual interest, and the investme 27 Aug 2011, 00:16
Kudos
Add Kudos
Bookmarks
Bookmark this Post
DeeptiM
Someone invested x dollars at simple annual interest, and the investment, including interest will be doubled in 8 and 1/3 years. What will be the total amount of the investment after 25 years?
Show more

x becomes 2x in 8.33 years.
x will become 3*2x in 25 years because the investment is SI and time is 25 years, 3 times 8.33

Ans: 6x
User avatar
DeeptiM
User avatar
Joined: 16 Feb 2011
Last visit: 01 Mar 2012
Posts: 141
Own Kudos:
1,294
Given Kudos: 9
Posts: 141
Kudos: 1,294
Someone invested x dollars at simple annual interest, and the investme 27 Aug 2011, 00:57
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Can you help me with formula used...also ans is 4x
User avatar
fluke
User avatar
Retired Moderator
Joined: 20 Dec 2010
Last visit: 24 Oct 2013
Posts: 1,095
Own Kudos:
5,169
 [1]
Given Kudos: 376
Posts: 1,095
Kudos: 5,169
 [1]
Someone invested x dollars at simple annual interest, and the investme 27 Aug 2011, 01:05
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
DeeptiM
Can you help me with formula used...also ans is 4x
Show more

Yes, it is my mistake. only x is actually accrued as interest in 8.33 years, thus 3x will be accrued in 25 years. Total=4x.

\(SI=P*r*t\)

\(x=x*r*(\frac{25}{3})\)

\(r=\frac{3}{25}\)

For 25 years:
\(SI=x*(\frac{3}{25})*(25)=3x\)

SI is just the interest, which is 3x, when added with principal x; it becomes 4x

Ans: "4x"
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 38,991
Own Kudos:
1,118
Posts: 38,991
Kudos: 1,118
Someone invested x dollars at simple annual interest, and the investme 11 Jun 2019, 12:18
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Automated notice from GMAT Club BumpBot:

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

This post was generated automatically.
Moderators:
Bunuel
Math Expert
109910 posts
Krunaal
Tuck School Moderator
852 posts