2
Some persons can do a piece of work in days. Two times the number of these people will do half of that work in?
Solve
In order to solve problem, you must evaluate 1 / 2 * n0 * 1 / 2.
Evaluate 1 / 2 = 0.5
Evaluate n0 * 0.5 = 4
Evaluate 0.5 * 4 = 2