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

Take away the whole and some still remain. What is it?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Can you find a five letter word that is left with only two letters if one is removed?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

What number do you get when you multiply all of the numbers on a telephone's number pad?

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

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?