I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

Which Travels Faster? Solve below famous picture riddle:

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

Which letter of the alphabet has the most water?

Which part of London exists in France as well ?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

I am quite hot but become too cold if you remove the first two letters. What am I?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.