question: In a class, the average age of 45 boys is 10 years and the average of 15 girls is 10 years. what is the average age of the whole class?
Options:
(A) 12 Years
(B) 12.3 Years
(C) 10 Years
(D) 13 Years
(E) 15 Years
answer: Stream of consciousness: Total age of 60 students
(45X 10+15 X 10) = 630
Average = 600/60 = 10 Years The answer is (C).

q: There are 16 teams in a tournament. If during the first round, each team plays every other team exactly once, how many games will be played in the first round?
Options:
(A) 15
(B) 30
(C) 120
(D) 240
(E) 256
a: Stream of consciousness: Number of ways to pick 2 teams from a total of 16 = 16C2 = 16!/14!*2! = 120. Hence The answer is (C).

question: Using all the letters of the word "THURSDAY", how many different words can be formed?
Options:
(A) 7
(B) 8!
(C) 9
(D) 3
(E) 1
answer: Stream of consciousness: Total number of letters = 8
Using these letters the number of 8 letters words formed is P = 8!. The answer is (B).

q: What percent is 120 of 80?
Options:
(A) 150 %
(B) 134 1/3 %
(C) 135 1/3 %
(D) 140 1/3 %
(E) 143 1/3 %
a: Stream of consciousness: 120/80 = 3/2
3/2 100 = 300/2 = 150 % The answer is (A).

question: If soundharya rows 49 km upstream and 77 km down steam taking 7 hours each, then the speed of the stream
Options:
(A) 6 kmph
(B) 5 kmph
(C) 2 kmph
(D) 3 kmph
(E) 4 kmph
answer: Stream of consciousness: Speed upstream = 49/7 = 7 kmph
Speed down stream = 77/7 = 11kmph
Speed of stream = (11-7) = 2 kmph The answer is (C).

question: A train running at the speed of 30 km/hr crosses a pole in 6 sec. What is the length of the train?
Options:
(A) 20 m
(B) 70 m
(C) 50 m
(D) Cannot be determined
(E) None of these
answer:
Stream of consciousness: Speed = 30 * 5/18 = 25/3 m/sec
Length of the train = speed * time = 25/3 * 6 = 50 m The answer is (C).