q: Find the simple interest on Rs.500 for 9 months at 6 paisa per month?
Options:
(A) 277
(B) 270
(C) 288
(D) 266
(E) 121
a: OK... I = (500*9*6)/100 = 270
The answer is (B).

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

q: A train of 24 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 4.5 km long?
Options:
(A) 4
(B) 3
(C) 5
(D) 6
(E) 9
a:
OK... D = 25 * 60 + 4500 = 6000 m
T = 6000/60 * 18/5 = 360 sec = 6 mins
The answer is (D).