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Compound Interest Problems

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Compound Interest Problems [#permalink]

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New post 28 Jul 2014, 14:57
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Compound Interest Problems


!
This post is a part of the Special Questions Directory focusing on Quant topics traditionally neglected and not covered by conventional sources but still tested on the GMAT. Many of these are above average difficulty questions

Compound interest questions are quite often for the test. Many of them involve quite ugly numbers and tedious math, which should be an indication that they can be solved with a shortcut approach or approximation.

PS:


alex-deposited-x-dollars-into-a-new-account-126459.html
peter-invests-100-000-in-an-account-that-pays-167793.html
if-1-000-was-invested-at-an-annual-interest-rate-of-64739.html
on-the-first-of-the-year-james-invested-x-dollars-at-128825.html
10-000-is-deposited-in-a-certain-account-that-pays-r-65464.html
jolene-entered-an-18-month-investment-contract-that-127308.html
louie-takes-out-a-three-month-loan-of-1000-the-lender-101506.html
michelle-deposited-a-certain-sum-of-money-in-a-savings-138273.html
alan-has-split-his-savings-equally-into-two-accounts-the-174445.html
leona-bought-a-1-year-10-000-certificate-of-deposit-that-143742.html
donald-plans-to-invest-x-dollars-in-a-savings-account-that-82702.html
a-sum-of-3310-is-to-be-paid-back-in-3-equal-installments-151366.html
diana-invested-61-293-in-an-account-with-a-fixed-annual-168637.html
on-a-certain-day-tim-invested-1-000-at-10-percent-annual-117437.html
jim-needs-1-000-to-buy-a-new-flat-screen-tv-since-he-has-159412.html
julie-put-half-of-her-savings-in-a-savings-account-that-pays-174262.html
shawn-invested-one-half-of-his-savings-in-a-bond-that-paid-s-37333.html
john-deposited-10-000-to-open-a-new-savings-account-that-135825.html
marcus-deposited-8-000-to-open-a-new-savings-account-that-128395.html
an-amount-is-deposited-into-an-account-accruing-interest-ann-141389.html
a-bank-offers-an-interest-of-5-per-annum-compounded-annua-154203.html
if-money-is-invested-at-r-percent-interest-compounded-annua-144266.html
a-sum-of-money-doubles-itself-at-a-compound-interest-in-15-y-167196.html
if-money-is-invested-at-r-percent-interest-compounded-annual-104225.html
an-investment-of-1000-was-made-in-a-certain-account-and-ear-142993.html
the-difference-between-simple-interest-and-compound-interest-of-a-198898.html

DS:


if-a-loan-of-p-dollars-at-an-interest-rate-of-r-percent-161402.html
on-may-1-of-last-year-jasmin-invested-x-dollars-in-a-new-133937.html
at-the-beginning-of-january-2003-elizabeth-invested-money-in-an-accou-194353.html


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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

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Re: Compound Interest Problems [#permalink]

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New post 19 Sep 2014, 02:36
1
This post was
BOOKMARKED
Bunuel wrote:

Compound Interest Problems


!
This post is a part of the Special Questions Directory focusing on Quant topics traditionally neglected and not covered by conventional sources but still tested on the GMAT. Many of these are above average difficulty questions

Compound interest questions are quite often for the test. Many of them involve quite ugly numbers and tedious math, which should be an indication that they can be solved with a shortcut approach or approximation.

PS:


alex-deposited-x-dollars-into-a-new-account-126459.html
peter-invests-100-000-in-an-account-that-pays-167793.html
if-1-000-was-invested-at-an-annual-interest-rate-of-64739.html
on-the-first-of-the-year-james-invested-x-dollars-at-128825.html
10-000-is-deposited-in-a-certain-account-that-pays-r-65464.html
jolene-entered-an-18-month-investment-contract-that-127308.html
louie-takes-out-a-three-month-loan-of-1000-the-lender-101506.html
michelle-deposited-a-certain-sum-of-money-in-a-savings-138273.html
alan-has-split-his-savings-equally-into-two-accounts-the-174445.html
leona-bought-a-1-year-10-000-certificate-of-deposit-that-143742.html
donald-plans-to-invest-x-dollars-in-a-savings-account-that-82702.html
a-sum-of-3310-is-to-be-paid-back-in-3-equal-installments-151366.html
diana-invested-61-293-in-an-account-with-a-fixed-annual-168637.html
on-a-certain-day-tim-invested-1-000-at-10-percent-annual-117437.html
jim-needs-1-000-to-buy-a-new-flat-screen-tv-since-he-has-159412.html
julie-put-half-of-her-savings-in-a-savings-account-that-pays-174262.html
shawn-invested-one-half-of-his-savings-in-a-bond-that-paid-s-37333.html
john-deposited-10-000-to-open-a-new-savings-account-that-135825.html
marcus-deposited-8-000-to-open-a-new-savings-account-that-128395.html
an-amount-is-deposited-into-an-account-accruing-interest-ann-141389.html
a-bank-offers-an-interest-of-5-per-annum-compounded-annua-154203.html
if-money-is-invested-at-r-percent-interest-compounded-annua-144266.html
a-sum-of-money-doubles-itself-at-a-compound-interest-in-15-y-167196.html
if-money-is-invested-at-r-percent-interest-compounded-annual-104225.html
an-investment-of-1000-was-made-in-a-certain-account-and-ear-142993.html

DS:


if-a-loan-of-p-dollars-at-an-interest-rate-of-r-percent-161402.html
on-may-1-of-last-year-jasmin-invested-x-dollars-in-a-new-133937.html




Terrific. I guess this should take care of the Interest Problem Issues once and for all.
:-D
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Re: Compound Interest Problems [#permalink]

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New post 30 Sep 2015, 22:44
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Compound Interest Problems [#permalink]

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New post 17 Feb 2016, 02:00
Great post!!! :D

Is there someone who knows where I can read some good theory about simple and coumpound interest?
Looking on internet I found something, but it wasn't so exhaustive, in fact I have been able to solve and understand only some questions.

Thanks in advance!
Expert Post
1 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 32531
Followers: 5625

Kudos [?]: 68233 [1] , given: 9797

Re: Compound Interest Problems [#permalink]

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New post 17 Feb 2016, 02:32
1
This post received
KUDOS
Expert's post
pepo wrote:
Great post!!! :D

Is there someone who knows where I can read some good theory about simple and coumpound interest?
Looking on internet I found something, but it wasn't so exhaustive, in fact I have been able to solve and understand only some questions.

Thanks in advance!


Percentages, Interest and More

Theory on Percent and Interest Problems

DS Percent and Interest Problems
PS Percent and Interest Problems

Hope it helps.
_________________

New to the Math Forum?
Please read this: 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

Re: Compound Interest Problems   [#permalink] 17 Feb 2016, 02:32
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