q: If 4 men can colour 48 m long cloth in 2 days, then 6 men can colour 72 m long cloth in
Options:
(A) 1 day
(B) 2 days
(C) 3 days
(D) 4 days
(E) 5 days
a: OK... The length of cloth painted by one man in one day = 48 / 4 2 = 6 m
No. of days required to paint 36 m cloth by 6 men = 72/ 6 6 = 2 day.
The answer is (B).

q: Imagine a disk spinning like a record player turn table. Half of the disk is black and the other is white. Assume you have an unlimited number of color sensors. How many sensors would you have to place around the disk to determine the direction the disk is spinning? Where would they be placed?
Options:
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5
a: OK... 1 sensor between the black and white border on the edge of disk
1 is enough to determine the drection
The answer is (A).

q: A train 150 meters long completely crosses a 240 meters long bridge in 42 seconds. What is the speed of the train is?
Options:
(A) 32
(B) 33
(C) 88
(D) 66
(E) 09
a:
OK... S = (150 + 240)/42 = 390/42 * 18/5 = 33
The answer is (B).