Quant Question of the Day Chat

Can somebody solve this inequality problem

Yes

Yes

Explanation

I came across similar type of question in Manhattan mock. If you test statement 1 with an x value of 4 and y value of 1 then it holds true. However, if you hold an x value of 1/4 and y value of 1/3 then it doesn’t hold true. Therefore not sufficient.

Statement 2: If you test with values of integers greater than 1 then with a value of x=2, x cube is 8 and if y value is 1 then x is always greater than y. But if you take negative fraction. X cube as -1/8 and y value of -1/4 then given condition holds true but x is less than y.

When you combine statement 1 and 2 then you’ll have to only take positive values of x or fraction between 0 and 1. There x will always be greater than y.

The trick in these question lies in consideration negative fractions and observing how the condition changes. Hope it helps.

Three people can complete a job in 12o hours
Doubling the number of workers does not double the speed but rather improves the output by 80%. How fast could six people complete the job?
A). 24 B).48 C). 72 D). 96




Someone should help me out

Persons=3
Time taken by 3 persons= 120
If the persons gets doubled i.e. total persons become 6, so for output to be 100% , half of the hours(120/2) would be taken for doing the same work by 6 persons,

So, 100% output——-60 hrs
1% output————60/100
80% output———-60/100* 80
80% output———48 hrs

So time taken by 6 person to do the job=120-48= 72 hrs

Posted from my mobile device

Hi everyone! I have a question about a problem solving question I founr in the gmat club but I am not sure what is the appropiate chat to mae the question

Could anyone tell me if there is another chat (not necessarily of teh question of the day) where I can make this question?

thank you

1.A sells an article to B at a profit of 10% B sells the article back to A at a loss of 10%. In this transaction:

A. A neither losses nor gains
B. A makes a profit of 11%
C. A makes a profit of 20%
D. B loses 20%


Please solve it in easy method

Answer: D - B loses 20%?

B. A makes a profit of 11%

Method

A sells a Rs. 100 item to B at 110. Making profit of 10. B sells it back to A at 99. (Discount of 10% of 110) So A got Rs. 110 for an item of final value = 99. Which is 11% profit.

But same workers from previous week are available for nxt week ryt? So total shud b 18 😕

So easiest way is to assume that the article is 100 USD.


If A sell with 10% profit -> sell for 110USD, then buy back with a 10% cheaper of new price -> 110 -110X10% = 99 -> A make a profit of 110 -99 = 11 -> which is 11% of 100

yeah 11 percent is right

do you any startegies to solve problems realted to rate , work hours ...?

You can look up in the search for problems related to the same. The concept only works by a single formula, used differently.
Also suggest watching videos by @KarishmaB from AnAPrep. Her video helped me understand quite a bit about it.

Thank you

is there any website where i can find previous GMAT real exam qsts

Do you mean GMAT mocks? If you are looking for questions that have appeared in the previous gmat exams and that are not released by GMAC, that is against GMAC Policy and will likely result in consquences