Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions

DS doubt

Expert replies
by ketkoag » Wed May 06, 2009 10:29 am
From May 1 to May 30 in the same year, the balance in a checking account increased.
What was the balance in the checking account on May 30?
(1) If, during this period of time, the increase in the balance in the checking
account had been 12 percent, then the balance in the account on May 30 would
have been $504
(2) During this period of time, the increase in the balance in the checking account
was 8 percent.

Now here this is a ques from sets and i am not sure but is the answer given directly in statement A for this ques or we have to ceck what is the percentage increase and the ans would then be E? please explain what exactly do we need here to find the balance on may 30 as i think that we need the actual percent increase for that month to calculate the balance. i'll post OA after few posts.
Join the discussion
Source: — Data Sufficiency |

by Uri » Wed May 06, 2009 11:06 am
IMHO the OA should be (C).

from st. 1 we can find the amount in the account on May 1. but we will not be able to find the final amount on May 31. so, (1) is insufficient.

from st. (2), we know the rate of increase. but if we don't know the initial amount then we can not calculate the final one also.

combining (1) and (2) we get all the required information.
Join the discussion

by ketkoag » Thu May 07, 2009 11:15 am
i marked the same answer that is C but OA is : A
Join the discussion

by scoobydooby » Thu May 07, 2009 11:37 am
stment 1)
let opening balance (1st May)=x
increase is 14%
=> closing balance (30 May)=1.14x. given that 1.14x=504
=>x=504/1.14
=>closing balance (30 May)=504/1.14*1.14=504

(in other words, closing balance is given) sufficient

stment 2)
let opening balance be x
increase is 8%
=>closing balance: 1.08x. we do not know x
not sufficient

hence, A
Join the discussion

by Uri » Thu May 07, 2009 10:32 pm
scoobydooby wrote:stment 1)
let opening balance (1st May)=x
increase is 14%
=> closing balance (30 May)=1.14x. given that 1.14x=504
=>x=504/1.14
=>closing balance (30 May)=504/1.14*1.14=504

(in other words, closing balance is given) sufficient

stment 2)
let opening balance be x
increase is 8%
=>closing balance: 1.08x. we do not know x
not sufficient

hence, A
scoobydooby, IMHO, the answer can not be (A). you needed no calculation to prove that (A) is sufficient, as according to you, the answer is clearly given! moreoever, if you observe the statement (1) a little more carefully, then you will find that it is only saying that the amount would be so much if the interest rate was so much. it never says that the actual interest rate was so. moreoever, in statement (2) the actual interest rate is given. the two interest rates in these two statements are clearly contradictory., which is not a characteristic of GMAT questions.

dear ketkoag, i have seen that several of your questions have wrong OA. as i have requested perhaps many times earlier also, if possible, firstly, please mention your source while posting, and secondly, please get rid of this source for your own benefit. there are many other good resources available even for free or for small amount.
Join the discussion

by scoobydooby » Fri May 08, 2009 5:02 am
you are right uri, the interest rate is not given in statement1. it cant be A. my bad, i fell into the trap
Join the discussion