It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

John was piloting a plane behind a car but was never able to overtake it. Why?

I don't get anymore wetter, no matter how much rain falls on me.

What has many keys but can’t open a single lock?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Seven Robbers robbed a bank and hide the coins in a lonely place.
They decide to divide the money equally the next morning. Two greedy robbers decided to cheat the others and reach the place at night. They equally divided the coins between them, one coin left. So they called another robber and then they decided to divide equally among the three. Sadly again one coin left. The same thing happened to the 4th 5th and the 6th robber.
However, when the 7th robber reached in the morning, they can divide the coins equally.

How many coins were there in total?

Give it food and it will live; give it water and it will die.

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

What is the riddle which can be asked all day with a different correct answer each time.

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?