q: A man rows his boat 95 km downstream and 45 km upstream, taking 2 1/2 hours each time. Find the speed of the stream?
Options:
(A) 10 kmph
(B) 6 kmph
(C) 5 kmph
(D) 8 kmph
(E) 7 kmph
a: Stream of consciousness: Speed downstream = d/t = 95/(2 1/2) = 38 kmph
Speed upstream = d/t = 45/(2 1/2) = 18 kmph
The speed of the stream = (38 - 18)/2 = 10 kmph The answer is (A).

question: If the ratio of boys to girls in a class is B and the ratio of girls to boys is G; then 7 (B + G) is ?
Options:
(A) more than 7
(B) Less than 3
(C) More than 3
(D) Less than 1/3
(E) none of these
answer: Stream of consciousness: Let number of boys = x
Let number of girls = y
Therefore x/y = B and y/x = G
7(B + G) = 7[(x/y) + (y/x)] = 7[(x2 + y2)/xy] > 7 The answer is (A).

q: 4 buses runs between Chennai and Mysore. If a man goes from Chennai to Mysore by a bus and comes back to Mysore by another bus, then the total possible ways are
Options:
(A) 4
(B) 8
(C) 12
(D) 16
(E) None of these
a: Stream of consciousness: Since the man can go in 4 ways and can back in 3 ways. Therefore total number of ways are 4 x3 = 12ways. The answer is (C).

question: People standing in a straight line are wearing alternating colored shirts. The pattern of shirts begins with red, followed by green, blue, and yellow. This pattern continues (red, green, blue, and yellow) until it ends with a green shirt. If there are more than 4 people in line, which of the following cannot be the number of people in the line?
Options:
(A) 18
(B) 22
(C) 42
(D) 41
(E) 74
answer: Stream of consciousness: The correct answer should not take the form: 4x + 2. Hence, it is The answer is (D).

q: What will come in place of the x in the following number series? 1, 4, 10, 22, 46, x
Options:
(A) 84
(B) 92
(C) 94
(D) 98
(E) 104
a: Stream of consciousness: 1
1 2 + 2 = 4
4 2 + 2 = 10
10 2 + 2 = 22
22 2 + 2 = 46
46 2 + 2 = 94 The answer is (C).

q: In a family, the father took 1/4 of the cake and he had 3 times as much as each of the other members had. The total number of family members is
Options:
(A) 3
(B) 7
(C) 10
(D) 12
(E) 15
a:
Stream of consciousness: 1-1/4 = remain cake 3/4
3/4*3 = 9/4
9/4+1/4 = 10 The answer is (C).