q: Find 12 19
Options:
(A) 238
(B) 228
(C) 208
(D) 277
(E) 101
a: Stream of consciousness: Mentally imagine this number as (10 + 2 ) 19 = 190 + 38 = 228. The answer is (B).

question: A train 460 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?
Options:
(A) 40
(B) 87
(C) 48
(D) 21
(E) 14
answer: Stream of consciousness: Speed = 45 * 5/18 = 25/2 m/sec
Total distance covered = 460 + 140 = 600 m
Required time = 600 * 2/25 = 48 se The answer is (C).

q: The average age of A, B and C is 29 years. If the average age of A and C is 32 years, what is the age of B in years ?
Options:
(A) 19
(B) 35
(C) 20
(D) 32
(E) 23
a: Stream of consciousness: Age of B = Age of (A + B + C) Age of (A + C) = 29 3 32 2 = 87 64 = 23 years The answer is (E).

question: In a class there are 60% of girls of which 25% poor. What is the probability that a poor girl is selected is leader?
Options:
(A) 22
(B) 15
(C) 77
(D) 17
(E) 11
answer: Stream of consciousness: Assume total students in the class = 100
Then Girls = 60% (100) = 60
Poor girls = 25% (60) = 15
So probability that a poor girls is selected leader = Poor girls / Total students = 15/100 = 15% The answer is (B).

q: Pipe A can fill a tank in 5 hours, pipe B in 10 hours and pipe C in 30 hours. If all the pipes are open, in how many hours will the tank be filled?
Options:
(A) 6 hours
(B) 8 hours
(C) 3 hours
(D) 9 hours
(E) 1 hours
a: Stream of consciousness: Part filled by A + B + C in 1 hour = 1/5 + 1/10 + 1/30 = 1/3
All the three pipes together will fill the tank in 3 hours. The answer is (C).

q: A can do a piece of work in 10 days. He works at it for 4 days and then B finishes it in 9 days. In how many days can A and B together finish the work?
Options:
(A) 6
(B) 8
(C) 12
(D) 15
(E) 20
a:
Stream of consciousness: 4/10+9/X = 1/x = 15
1/10+1/15 = 1/6 = 6 days The answer is (A).