question: Working alone, Printers X, Y, and Z can do a certain printing job, consisting of a large number of pages, in 12, 20, and 20 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) 10/1
(E) 11/4
answer: Stream of consciousness: P1 takes 12 hrs
Rate for P2P3 together = 1/20 + 1/20 = 1/10
Therefore they take 10
Ratio = 10/1 = The answer is (D).

q: A car finishes a journey in ten hours at the speed of 60 km/hr. If the same distance is to be covered in eight hours how much more speed does the car have to gain?
Options:
(A) 8 km/hr
(B) 10 km/hr
(C) 12 km/hr
(D) 16 km/hr
(E) None of these
a: Stream of consciousness: Distance covered by the car = 64 10 = 640 km
\ Speed = 6408 = 80 km/hr
\ Speed gain = 80 64 = 16 km/hr The answer is (D).

question: John makes $60 a week from his job. He earns a raise and now makes $90 a week. What is the % increase?
Options:
(A) 16%
(B) 50%
(C) 17%
(D) 17.61%
(E) 17.56%
answer: Stream of consciousness: Increase = (30/60)*100 = (3/6)*100 = 50%. The answer is (B).

q: Find the amount on Rs.8000 in 9 months at 20% per annum, if the interest being compounded quarterly?
Options:
(A) 1323
(B) 9261
(C) 2788
(D) 2999
(E) 1722
a: Stream of consciousness: A = 8000(21/20)3 = 9261 The answer is (B).

question: 3 candidates in an election & received 1136, 7636 and 11628 votes respectively. What % of the total votes did the winning candidategot in that election?
Options:
(A) 50%
(B) 52%
(C) 57%
(D) 60%
(E) 65%
answer: Stream of consciousness: Total number of votes polled = (1136 + 7636 + 11628) = 20400
So, Required percentage = 11628/20400 * 100 = 57% The answer is (C).

question: Find the odd man out
253, 136, 352, 329, 631, 244
Options:
(A) 329
(B) 136
(C) 352
(D) 631
(E) 531
answer:
Stream of consciousness: The sum all three digits comes to 10 except 329 The answer is (A).