q: How long does a bus 100 m long traveling at 50 kmph takes to cross a bridge of 150 m in length?
Options:
(A) 18
(B) 16
(C) 15
(D) 11
(E) 12
a: Stream of consciousness: D = 100 + 150 = 250 m
S = 50 * 5/18 = 125/9
T = 250 * 9/125 = 18 sec The answer is (A).

question: Find the odd man out
253, 136, 352, 328, 631, 244
Options:
(A) 328
(B) 136
(C) 352
(D) 631
(E) 531
answer: Stream of consciousness: The sum all three digits comes to 10 except 328 The answer is (A).

q: The average of Suresh's marks in English and History is 55. His average of marks in English and Science is 65. What is the difference between the marks which he obtained in History and Science?
Options:
(A) 40
(B) 60
(C) 20
(D) Data inadequate
(E) None of the above
a: Stream of consciousness: E + H = (55 2) = 110;
E + S = (65 2) = 130
Reqd difference = 130 110 = 20 The answer is (C).

question: What is the units digit of the expression 14^715^4?
Options:
(A) 0
(B) 8
(C) 4
(D) 6
(E) 3
answer: Stream of consciousness: I think answer on this one should be B too. Since we know that 14^7>15^4, as Will said one should always check if the number is positive. The answer is (B).

q: How much is 80% of 40 is greater than 4/5 of 25?
Options:
(A) 17
(B) 19
(C) 11
(D) 12
(E) 10
a: Stream of consciousness: (80/100) * 40 (4/5) * 25
32 - 20 = 12 The answer is (D).

q: By how much is 70% of 120 greater than 35% of 200.
Options:
(A) 15
(B) 14
(C) 13
(D) 16
(E) 17
a:
Stream of consciousness: (70/100) * 120 (35/100) * 200
84 - 70 = 14 The answer is (B).