Question

what is the minimum age below which no one can employ a child

Answer 1

14..... is the minimum age below which children can't be employed.......... :)

Answer 2

Population in the world is classified  into 2 groups.
1.Working population .Age group of the working population is  15yrs or more and less than 59yrs.
2.Non working population.The rest of the people in the world is  considered non working.So 15 years is the minimum age at which you can work.