Two women were selling marbles in the market place, one at three for a cent and other at two for a cent. One day both of them were obliged to return home when each had thirty marbles unsold. They put together the two lots of marbles and handing them over to a friend asked her to sell them at five for two cent. According to their calculation, after all, three for one cent and two for one cent was exactly the same as five for two cent. But when the takings were handed over to them, they were both most surprised, because the entire lot together had fetched only 24 cent! If however, they had sold their marbles separately they would have fetched 25 cents. Now where did the one cent go? Can you explain the mystery?