What is the longest word in the dictionary?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

If 21x = 79x, what is the value of x?

What's the only room from which no one can enter or leave

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

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

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Why do Chinese men eat more rice than Japanese men do ?

Why is the longest human nose just 11 inches?