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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

If you have choices as 165, 167, 169, 170, 171, better use long division of 69/41 and multiply by 100 by shifting decimal 2 digits to the right.
_________________

Re: Can Someone Please Help Me( Division Strategy) [#permalink]

Show Tags

07 Jul 2011, 00:48

Generally I follow the common factor strategy. In this case, 46 seems to be a strategy. Coming to decimals in the denominator, they are best handled by drawing up equivalent fractions. In your case, .82 is almost 4/5. So I would calc 138/.82 as 138*5/4 = 34.5*5 nearly 172.5. So any answer that is as close to this as possible would be my pick. Regards Rahul
_________________

If you are looking for a fast estimation technique, here is how I would estimate the expression:

138/.82 ~ 140/.80 -->1400/8 --> 350/2 ~ 175

If you need more precise estimation, you can move backward to correct your answer. In my calculation I overestimate 138 (140 is about 1.5% larger) and underestimate 0.82 (0.8 is about 2.5% lower). so, the more precise estimation would be 175 - (1.5% + 2.5%)*175 ~ 175-7 ~ 168. It seems to be difficult but in fact it's not if you know how to estimate small percentages fast. For example, 1% of 175 is 1.75, so 4% of 175 is 2*2*1.75 = 7.
_________________

Re: Can Someone Please Help Me( Division Strategy) [#permalink]

Show Tags

12 Jul 2011, 10:37

TIP for multiplication and division always use fractions and decimals for summation and subtraction 138/0.82= 138/(82/100)= 138*(100/82)=69*(100/41)=69*2.5=69*2 + 69*0.5 = 172.5 ( i rounded 100/41 to 100/40 ) you can round 69 to 70 then it become easier 70*2.5=175
_________________

How can i lose my faith in life's fairness when i know that the dreams of those who sleep on the feathers are not more beautiful than the dreams of those who sleep on the ground? - Jubran Khaleel Jubran

Re: Can Someone Please Help Me( Division Strategy) [#permalink]

Show Tags

25 Jun 2015, 00:44

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).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

While this is an old series of posts, there are tips to be had beyond the obvious 'mathematical advice' offered herein. While it might be tempting to get 'caught up' in the calculations (since the Quant section of the GMAT does require the use of THAT skill), the Quant section of the GMAT is NOT a 'math test', so you should be on the lookout to NOT do any unnecessary math.

In certain DS questions, simply 'setting up' the work is enough to determine sufficiency or insufficiency, so a big calculation is not required. In certain PS questions, the answer choices are 'spaced out' enough that rounding or estimation is the faster method to get to the correct answer (and sometimes the prompt itself will TELL YOU to estimate). In many cases, if you find yourself thinking "it will take forever to do all of this math", then there is probably another way to approach the question.

Re: Can Someone Please Help Me( Division Strategy) [#permalink]

Show Tags

26 Oct 2016, 02:42

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).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

There’s something in Pacific North West that you cannot find anywhere else. The atmosphere and scenic nature are next to none, with mountains on one side and ocean on...

This month I got selected by Stanford GSB to be included in “Best & Brightest, Class of 2017” by Poets & Quants. Besides feeling honored for being part of...

Joe Navarro is an ex FBI agent who was a founding member of the FBI’s Behavioural Analysis Program. He was a body language expert who he used his ability to successfully...