1.  A man completes 5/8 of a job in 10 days. At this rate, how many more days will it takes him to finish the job?
A. 5
B. 6
C. 7
D. 7(1/2)

Answer: Option B

Explanation:

Work done = 5
8

Balance work = 1 - 5 = 3
8 8

Let the required number of days be x.

Then, 5 : 3 = :: 10 : x     5 x x = 3 x 10
8 8 8 8

x = 3 x 10 x 8
8 5

x = 6.