the source is gmat prep the new question pack, the gmatprep explanation for B says the conjunction and anticipates a second verb to parallel sank, instead, this sentence introduces a new clause, not a new verb. The subject of this new clause they has no antecent; it cannot refer to archeaologists, b...

Laos has a land area about the

Laos has a land area about the same as Great Britain but only four million in population, where many are members of hill tribes ensconced in the virtually inaccessible mountain valleys of the north. (A) about the same as Great Britain but only four million in population, where many (B) of about the ...

S and T are two water pumps that run at constant rates.

S and T are two water pumps that run at constant rates. If pump T pumped alone, how many more hours would it take for it to finish pumping a large container than it would take for pump S to accomplish the same task by itself? (1) When both the water pumps work together, they finish pumping a ...

Rates

John, Michael and Sameer paddled a boat for about 1500 feet. Who paddled the boat for the longest distance on the trip?
 
(1) John paddled 1 hour more than Michael did but at an average rate of 5 feet per hour slower than Sameer.
(2) Sameer paddled 9 hours and averaged 50 feet per hour.


E

Divisibility

Is N*M/8 ?
1) N is divisible by 5
2) N*M is divisible by 40


B

Number Properties

p^a* q^b* r^c* s^d = x, where x is a perfect square. If p, q, r, and s are prime integers,
are they distinct?

(1) 18 is a factor of ab and cd

(2) 4 is not a factor of ab and cd

B

Overlapping Sets

At company X, 44% of the employees that own laptops do not own cellphone, and 30% of the employees that own cellphone do not own laptops. If the number of employees without laptops is 40% less than the employees with laptops, then what percent of the company's employees neither own a laptop nor a ce...