Question: Working alone, Printers X, Y, and Z can do a certain printing job, consisting of a large number of pages, in 12, 25, and 30 hours, respectively. What is the ratio of the time it takes Printer X to do the job, working alone at its rate, to the time it takes Printers Y and Z to do the job, working together at their individual rates?
Options:
(A) 4/11
(B) 1/2
(C) 15/22
(D) 150/11
(E) 11/4
Answer: P1 takes 12 hrs
Rate for P2P3 together = 1/25 + 1/30 = 11/150
Therefore they take 150/11
Ratio = 150/11 =
The answer is (D).

Question: Find the simple interest on Rs.500 for 9 months at 6 paisa per month?
Options:
(A) 238
(B) 270
(C) 987
(D) 167
(E) 121
Answer: I = (500*9*6)/100 = 270
The answer is (B).

Question: In case T, S and X are the only individuals sewing on committee B, the members of committee C should be:
Options:
(A) Z and Y
(B) Z and W
(C) Y and V
(D) Y and U
(E) Y and W
Answer: Y and U Because in committee b the individuals are S and X so in committee c the individuals will be Y and U
The answer is (D).

Question: Find the value of y from (12)^3 x 6^4 432 = y?
Options:
(A) 2134
(B) 2245
(C) 3450
(D) 4500
(E) 5184
Answer:
Given Exp. = (12)3 x 64 = (12)3 x 64 = (12)2 x 62 = (72)2 = 5184
432 12 x 62
The answer is (E).