Solving the first in equality i get the values of x as 3 or 4

1/5 < 1/(x+1) means, x=1,2,3,4,0
1/(x+1) < 1/2 means, x=3,4,5,..... or -2, -3, -4....

So, x should be 3 or 4

Solving the second equation i get the values of x as 3 or 4.

So, my answer is E.


What is the OA?

In 1 hour A finishes 1/x of the deck and B finishes X decks. When A and B work together in 1 hour they could finish (1/x + x) of the deck or (x^2 + 1)/x. It takes x/(x^2+1) hrs to complete one deck. After "A" has worked alone for "y" hours, remaining number of decks would be (100...

What is the OA?

IMO, statement 2 itself is sufficient.

distance between t and r = distance between t and -s
This implies r = -s.

Isn't this enough to say that 0 is between s and -s and hence r and s?

santsark is right. I also assumed that y > 36 and choose C, which is not the right answer.

OA is E.

Thanks arocks. I made a mistake in STU. <UST and <UTS are equal. But in my equations i considered <STU and <SUT are equal.

Thanks

DS question from GMAT PREP - II

Can somebody help me in solving this problem?

Thanks arocks. I have a question - D: If the doctors are prescribing more generic drugs instead of expensive prescription drugs, the per capita expenditure on drugs should decrease. - In this case is the assumption that generic drugs costs less than prescription drugs correct? A - The manufacturers ...