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or let's say, my card is recharged at 500 cents, and I pay 500 cents at once to the card reading machine, and I need 50 copies, it will give me 500 copies but it will charge the whole amount, basically it won't return the extra 50 cents that it should have, I am getting a bit confused here

@@Add-itaditikapoor This is a PREPAID card for 50 copies. Think of how prepaid cards are used in a video game parlor, say. Then re-read the argument.

@@karishma.anaprep so let’s say I have recharged my card for 1000 rupees, and the games that end up playing have in total cost me 800 rupees, so I have 200 bucks left, but there is no game for 200 rupees, that’s how there would be more revenue for the parlour right?

⁠​⁠@@Add-itaditikapoorassume each game is for 10 rupees since the cost of each copy you make is a fixed small cost so you can completely finish it if you want. But say you don’t have time anymore and must leave. You later lose the card or are unable to come back to finish the money. That is how the parlour gains. Here there is photocopying. If you don’t need to photocopy anything more, you may not be able to use it fully.

Diff between B and C is 2 which means that they have met twice. This is not their first meeting. But when they met the first time, A was not there. Since we need the first meeting of all 3 of them, that happened when A and B met for the first time. At that time B and C were meeting for the 2nd time and A and C were meeting for the 3rd time. Still all 3 met together at that time for the FIRST time.

@ ahh! Got it, thanks a lot, your way of explanation and techniques are really good

@karishma.anaprep May I know, are such questions still asked in gmat fe? Didn’t come across in Gmat club tests?

@@Add-itaditikapoor Here is the thing - they are a part of TSD word problems and circular motion is fair game in GMAT. If you look at individual topics, they may have just 1% probability of coming in the test but you get only 21 questions so there will be many topics that will not show up. But if you get even 1 question on a topic, it will make 5% of your score. All in all, can we afford to ignore any topic because it makes up a small percentage of questions? No.

@@karishma.anaprep agreed!

You forgot the other 100. You have one score of 0 in your calculation that brought the average down. Remember there's 2 that scored 100, so you should've been doing (12*63 + 11*73 + 100*2)/25. The way i solved it was I multiplied the "mean" by the number (70*25), that way I just need to know "is the SUM > 1750?". Plus DI allows a calculator now, albeit not a very good one...

So you got the average less than 70. Now take (63 + 22*73 + 2*100)/25 and the average will be more than 70. So you can get the average as less than 70 and more than 70. So both statements together are not sufficient. Ans (E)

@@drasteilYeah, a very silly mistake which would lead to ans E as well as Karishma pointed out. Oh, Thanks for another method!!

@@karishma.anaprep Yes, just found out my mistake. Thanks for the clarification!

We need to use our own logic for that. Adele has been traveling at speed s and Tom at 3s and they cover the same distance. This means Adele travels for 3 units of time while Tom travels for 1 unit (only then distance will be same). They cover the same distance in that time. The extra time taken by Adele is 1 hr 20 min which is given to us. She traveled for this much time extra. So the extra 2 units = 80 mins.

What is the conclusion? To achieve A, govt spending is necessary. Now if we negate option (E) and make it "Govt spending is not more likely to increase A" then our conclusion breaks. Then govt. spending is not necessary. The negation of the assumption breaks the conclusion.

@@karishma.anaprep Thank you for the reply. Is "Govt spending is not more likely to increase A" a strong enough argument to prove the conclusion invalid. because it is totally possible that govt spending becomes necessary even while its not more likely to increase A? (Maybe non-govt spending is not enough/available?)

@@anushavuyyuru-q6m It is strong enough to say that "Govt spending is not NECESSARY then" (since it is less likely to increase A)

If you must take values, take them as 1/4 and 1/9 so that you know their square roots.

All I know is the estimate of tutoring is 30 and estimate of total is 100. The actual values could vary anywhere from 25 to 37.5 for tutoring income (numerator) and 83.33 to 120 for total income (denominator). Nothing says that if I am, say, overestimating the tutoring income, I must overestimate the total income also in the same proportion etc. I may have grossly underestimated income from other sources. All I know are estimates. They are calculated independently, as far as we know.

@karishma.anaprep this really helps. Thanks a lot.

I thought if error is less than 20%, then the estimate tutoring income could vary from 24 to 36 (if estimate value before error is 30), whereas total income could vary from 80 to 120. Could you please help, where I am wrong?

@@ayazyakupov1216 The estimation error has actual value as the base, not the estimated value. That is why we do what we have done here.

Sp + 2% * Sp = Sp (1+2/100) = Sp * 51/50 This is the concept of fraction percent equivalents. Discussed here: th-cam.com/video/HxnsYI1Rws8/w-d-xo.html

Certainly!

This question is to help you understand the relationship between on the number line. Something like this will certainly be hard on GMAT because it will take time to evaluate each statement. Gmat is likely to expect you to evaluate at most 2 such statements in a question (say in DS).

Yeah.. GMAT tests your conceptual understanding, not Math skills…

I mean what physical quantity the weight is. When I am averaging speeds, 'time' must be the weight. I cannot take distance as the weight. Say if I know that speed of 50 was maintained for 1/4 of the distance and speed of 60 was maintained for 3/4th of the distance, I cannot use this formula here.

We have 1/3 = (60 - Cavg)/(Cavg - 50). We cross multiply to get (Cavg - 50) = 3*(60 - Cavg) which gives us 4 Cavg = 230 which gives Cavg = 57.5 In my opinion, it is far too much calculation since using the scale diagram, my answer comes instantly but different learners like different approaches so I have discussed both.

Check out the complete video at anaprep.com All content is free for the next 2 days.

Glad to know this Aditi! You can check out my Verbal and DI content too. I have covered everything GMAT related in those two sections too.

How did you arrive at this equation?

E is not correct for the reasons discussed. Note that official questions often have different versions for the same context. You may have a similar otter orca question with a different question stem and options and hence the answer there could be different.

The 0.6% average is for the first two slabs of 0% and 1%. The 0% applies to first 2k and the 1% applies to next 3k. So overall, the 0.6% applies to 5k. Since weights of both are found to be equal, it means the 2% applies to 5k as well. That is how we get 10k.

Check this blog post: anaprep.com/arithmetic-usefulness-of-deviations/

From E to B a connector train will be required but we are given in the question stem that Y must use the main trails only.

@ oh got you, thank you so much

@@shubhammaurya2658 Thank you Shubham! Wishing you a joyful Diwali too!

How do you get x as 20? So x + 20 + 220 = 11x gives x = 24

Too many variables. Also it is rye grass + bluegrass of one and rye grass+ fescue for another. I do not understand from where the values you have used are coming.

@@karishma.anaprep Ah! I see, thanks

Encourages me to know that at least some people are focusing on the takeaways, not just how to solve the question in front of you.

We use the basics of circular motion here. Suggest you to check those out and then come back to this video.

Actually, you don't even need to specify that there is atleast 1 prescription for each drug. You are setting up a general truth statement. If he filled all with Pan D, he filled all with amoxy too. Actually whether there were any with pan D or amoxy, doesn't matter. This condition holds, that's it.

Aryan, that video is a part of our subscription. The webinar is mainly attended by the subscribers so some communication to them also gets captured in the videos.

Think of the question as a whole, not a bunch of disjoint data points. When we make equations - take this x and that y, we are breaking the question into small parts and then trying to bring them back together again with algebraic manipulations. That takes twice the time and gets complicated. During practice, invest time in understanding the question as a whole.

@@karishma.anaprep Thank you, and thanks for all your solutions all over the internet. My exam is tomorrow, hope it goes well :)

@@abhimanyuchaturvedi9110Best wishes!!