As rare as something becomes, be it a baseball card or a musical recording or a postage stamp, the more avidly it is sought by collectors . (A) As rare as something becomes, be it (B) As rare as something becomes, whether it is (C) As something becomes rarer and rarer, like (D) The rarer [...]

Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solution Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new solution is liquid X? A) 30% B) 100/3 % C) 75/2 % [...]