If 10 persons can make 20 articles in a day, then how many persons are required to make 10 articles in a day?

Twelve persons can do a piece of work in 20 days. How many persons are required to do the same in 24 days?

Four persons can build a wall in 12 days . How many persons will be required to build the same will in 8 days.

If 20 persons can clean 20 floors in 20 days, then in how many days can 16 persons clean 16 floors?

If 20 persons can do a piece of work in 7 days, then the number of persons required to complete the work in 28 days:

If 40 persons can do a piece of work in 14 days, then the number of persons required to complete the work in 28 days.

30 persons can do a piece of work in 24 days. How many more people are required to complete the work in 20 days?

A man can make 3 almirahs in 4 days,how many days will he need to make 12 almirahs?