A boy collects white seashells 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?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

What does an Island and the letter T have in common?