How many brown shells can he sell to the trader?

Question

A boy collects white sea shells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?

Answer 1

Thanks for the query.

The answer is - 0 (because the boy collects white shells).