question: In what time a sum of money double itself at 8% per annum simple interest?
Options:
(A) 33 1/8%
(B) 33 1/3%
(C) 83 1/3%
(D) 33 4/3%
(E) 12 1/2%
answer: Stream of consciousness: P = (P*8*R)/100
R = 12 1/2% The answer is (E).

q: A train of 25 carriages, each of 60 meters length, when an engine also of 60 meters length is running at a speed of 60 kmph. In what time will the train cross a bridge 1.5 km long?
Options:
(A) 2 mins 14 sec
(B) 2 mins 34 sec
(C) 180 sec
(D) 4 mins 54 sec
(E) 2 mins 44 sec
a: Stream of consciousness: D = 25 * 60 + 1500 = 3000 m
T = 3000/60 * 18/5 = 180 se The answer is (C).

question: Six students are equally divided into 3 groups, then, the three groups were assigned to three different topics. How many different arrangements are possible?
Options:
(A) 30
(B) 60
(C) 90
(D) 180
(E) 540
answer: Stream of consciousness: Ways of selecting group = 6C2 * 4C2 * 2C2 / 3! = 15
Three groups can select three subjects in 6 ways
Therefore total combinations = 15*6 = 90 The answer is (C).

q: 137+276=435 how much is 731+672?
Options:
(A) 534
(B) 1403
(C) 1623
(D) 1513
(E) 1613
a: Stream of consciousness: 137-731 and 276-672 similarly 435-534 The answer is (A).

question: In a school of 400 boys, 44% of Muslims, 28% Hindus, 10% Sikhs and the remaining of other communities. How many belonged to the other communities?
Options:
(A) 41
(B) 63
(C) 72
(D) 63
(E) 50
answer: Stream of consciousness: 44 + 28 + 10 = 82%
100 82 = 18%
400 * 18/100 = 72 The answer is (C).

question: 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
answer:
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).