Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

What happened when the wheel was invented?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

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

Can you name an animal whose killing cannot be performed without spilling your own blood?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

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

A man was gazing through the window of the 23rd floor of the building. He suddenly opened the window and jumped on the other side of the window. On landing on the floor, there was not a sheer mark of injury on him.

How can that be possible if he did not use any kind of parachute and did not land on a soft surface?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?