What always comes into a house through the keyhole?

Can you fill the blank with the correct number?

6 30 870 756030 _____

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Why are televisions attracted to people?

How can you make number one disappear by adding something to it?

Which alphabet letter is a question?

What is the end of everything?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?