q: The compound ratio of 2/3, 6/7, 1/5 and 1/8 is given by?
Options:
(A) 7/98
(B) 1/48
(C) 1/98
(D) 3/350
(E) 1/68
a: Stream of consciousness: 2/3 * 6/7 * 1/5 * 1/8 = 12/1400 = 3/350 The answer is (D).

question: How much is 90% of 40 is greater than 4/5 of 25?
Options:
(A) 29
(B) 776
(C) 66
(D) 16
(E) 99
answer: Stream of consciousness: (90/100) * 40 (4/5) * 25
36 - 20 = 16 The answer is (D).

q: The average weight of 36 men is 50 kg. It was found later that the figure of 37 kg was misread as 73 kg. What is the correct average?
Options:
(A) 49 kg
(B) 51 kg
(C) 50.5 kg
(D) 51.5 kg
(E) None of these
a: Stream of consciousness: Correct average = [( 50 x 36) - 73 + 37 )]/36 = 1764/36 = 49 kg. The answer is (A).

question: From among the 31 students in a class, one leader and one class representative are to be appointed. In how many ways can this be done?
Options:
(A) 1360
(B) 1260
(C) 1060
(D) 1160
(E) 930
answer: Stream of consciousness: There are 31 students and every one has equal chance of being selected as a leader. Hence, the leader can be appointed in 31 ways. When one person is appointed as leader, we are left with 35 students. Out of these 30 teachers, we can select one class representative. So, a class representative can be selected in 30 ways. Hence, the number of ways in which a leader and class representative can be selected = 31 x 30 = 930 The answer is (E).

q: A certain car uses 12 gallons of gasoline in traveling 360 miles. In order for the car to travel the same distance using 10 gallons of gasoline, by how many miles per gallon must the car's gas mileage be increased?
Options:
(A) 2
(B) 4
(C) 6
(D) 8
(E) 10
a: Stream of consciousness: 360/10 = 36. The difference is 36 - 30 = 6. The answer is (C).

q: A, B, C together started a business. A invested Rs.6000 for 5 months B invested Rs.3600 for 6 months and C Rs.7500 for 3 months. If they get a total profit of Rs.9880. Find the share of B?
Options:
(A) 2880
(B) 3000
(C) 3018
(D) 3019
(E) 3012
a:
Stream of consciousness: 60*5:36*6:75*3
100: 72: 75
72/247 * 9880 = 2880 The answer is (A).