What happened when the wheel was invented?

You need to arrange three 7 and mathematical symbols to form number 1?

What occurs twice in a week, once in a year but never in a day?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

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

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

What seven-letter word has hundreds of letters in it?