10 men do a work in 10days. How many men are needed to finish the work in 5days?	Choose the correct choice from the following choices
A) 50 B) 20 C) 30 D) 10 E) 15

Rationale: "men required to finish the work in 5 days = 10 * 10 / 5 = 20 answer is b"
Answer: B