We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

Our product and our sum always give the same answer. Who are we?

If EELS + MARK + BEST + WARY = EASY

What does HELP + BARK + WARD + LEAD equal?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

Keyboard words are not in alphabetical order, Why?

You can see it everyday, But cannot touch it at will. What is it?

I can write cow in 13 letters.

Can You?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

Why Aeroplane windows are round?

Replace the question mark with the correct number in below Picture: