GMAT Questions Chat Group

This is quite a lengthy approach. solving such ques by using matrix table would be more easier.

But I can’t draw a table here, so I solved it like that

No, I can understand you cannot draw table here. But I am just asking that the way to approach ques by creating matrix would be less time consuming in real test.

such

Yes you’re right

Thanks for your confirmation. But I must say admit that you are maths genius.

must admit

in a certain football tournament, Champs had set a target for themselves of winning at least 35 games. They won only 40% of their first n games and now they need to win all their remaining games to achieve their target. how many games are yet to be played? 1. Champs will play a total of 50 games 2. of their remaining games , if they were to win only 10 games, they would have lost 60% of their games played.

Interesting question. I will give it a try Now we know as per the data that Champs want to have total wins >= 35 ( minimum is 35) Let the total games be= T & For the first "n" games, they won 0.4n and lost 0.6n, so remaining games = T-n What we really want to find here is " T-n " i.e how many games are yet to play. Now they need to win 100% of (t-n) to reach at least 35 wins as per their goal. So we can form an equation here: 0.4n +T-n = 35, So, T-0.6n= 35 ............. (1) Statement (1): T=50, If you plug in T in (1) you can easily get n and hence T-n could be found out. Statement 1 is sufficient. Statement (2): Now this is the tricky part here I feel. If they win 10 games of T-n then they would have lost 60% of total games played or won 40%. Lets take the aspect of winning: 10+ 0.4n = (40/100) * T If you simplify this further, 10+0.4n= 0.4T, so, 0.4T-0.4n= 10, T-n= 10/0.4= 25, So we have got our T-n, hence Statement 2 is also sufficient. IMO, D is the answer.

Please let me know if there is an official solution to this

there is no official solution for this

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Even though T-n=25 ... We do not know the total number of games which could be more

My answer is A

Okay nice, but why do we need Total number of games? What they have asked in question is how many games yet to played. Taking total as T and initially played n games, don’t we need just "T-n" ?

Hi guys! Can someone tell me how I can do calculations more efficiently for Problem Solving? When it comes to fractions, decimals and percents, and calculation in general, I tend to go step by step. Currently, it takes me around 3 mins to complete PS questions.

My exam is on Jan 31, I’m taking the Classic Edition, so finding timing strategies and calculation efficiency is my no 1 focus

it’s kinda depend on the questions ||, normally GMAT is tricky and there is definitely the way to calculate fast each time. If you have some examples, it’s more easier to point out

Okay, so I did this geometry question which took me 3:22 mins

triangles-abc-and-aed-are-congruent-where-bc-de-if-y-63-what-is-the-402096.html

machines-u-and-t-can-produce-10-000-units-in-x-hours-when-working-423917.html

3:22 mins

in general, my calculation speed is lower for PS but I am fairly efficient on DS

the-table-above-gives-the-gasoline-costs-and-consumption-rates-for-a-c-241066.html

This one took me 3:38 mins

what is your approach?