q: In how many different ways can the letters of the word 'EVER' be arranged?
Options:
(A) 12
(B) 280
(C) 300
(D) 310
(E) 360
a: Stream of consciousness: Number of ways = 4!/2! = 4X3X2X1/2X1 = 12 The answer is (A).

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) 50
(B) 75
(C) 100
(D) 120
(E) 25
answer: Stream of consciousness: Speed = 60 * 5/18 = 50/3 m/sec
Length of the train = speed * time = 50/3 * 3 = 50 m The answer is (A).

q: A man rows his boat 80 km downstream and 45 km upstream, taking 2 1/2 hours each time. Find the speed of the stream?
Options:
(A) 1 kmph
(B) 6 kmph
(C) 5 kmph
(D) 8 kmph
(E) 7 kmph
a: Stream of consciousness: Speed downstream = d/t = 80/(2 1/2) = 32 kmph
Speed upstream = d/t = 45/(2 1/2) = 18 kmph
The speed of the stream = (32 - 18)/2 = 7 kmph The answer is (E).

question: Two pipes can fill a tank in 20 and 12 hours, while third pipe will make the tank empty in 20 hours. If all three pipes operate simultaneously. In how many hours the tank will be filled ?
Options:
(A) 5 Hours
(B) 7 Hours
(C) 8 Hours
(D) 9 Hours
(E) 12 Hours
answer: Stream of consciousness: In 1 hour it fill 1/20 + 1/12 - 1/20 = 1/12
So fill tank fill up in 12 Hours The answer is (E).

q: The speed of a car is 120 km in the first hour and 60 km in the second hour. What is the average speed of the car?
Options:
(A) 89 kmph
(B) 92 kmph
(C) 90 kmph
(D) 65 kmph
(E) 77 kmph
a: Stream of consciousness: S = (120 + 60)/2 = 90 kmph The answer is (C).

q: Find the simple interest on Rs.620 for 10 months at 10 paisa per month?
Options:
(A) 277
(B) 620
(C) 640
(D) 678
(E) 121
a:
Stream of consciousness: I = (620*10*10)/100 = 620 The answer is (B).