question:30 pens and 75 pencils were purchased for 570. If the average price of a pencil was 2.00, find the average price of a pen.
Options:
(A) 10
(B) 11
(C) 12
(D) 13
(E) 14
answer:(E)
Stream of consciousness:Since average price of a pencil = 2
Price of 75 pencils = 150
Price of 30 pens = (570 150) = 360
Average price of a pen = 42060 = 14

question:In what time will a railway train 60 m long moving at the rate of 36 kmph pass a telegraph post on its way?
Options:
(A) 10 sec
(B) 8 sec
(C) 5 sec
(D) 6 sec
(E) 11 sec
answer:(D)
Stream of consciousness:T = 60/36 * 18/5 = 6 sec

question:A train running at the speed of 60 km/hr crosses a pole in 3 sec. What is the length of the train?
Options:
(A) 56
(B) 78
(C) 27
(D) 79
(E) 50
answer:
(E)
Stream of consciousness:Speed = 60 * 5/18 = 50/3 m/sec
Length of the train = speed * time = 50/3 * 3 = 50 m