What is the riddle which can be asked all day with a different correct answer each time.

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

No matter how little or how much you use me, you change me every month. What am I?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Which alphabet letter is a question?

What goes through cities and fields, but never moves?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

1. Where does Easter come from before Valentine's Day?

2. Do you know what is in the middle of Valentine's?

3. What did the lady bee say to the man bee on the occasion of Valentine's Day

A woman named Maria was at the funeral of her mother. She met a nice young man that she had never seen before and after the service, they spent a bit of time together. Then she got busy and didn’t get his name or phone number before he left. She tried to find him, but no one knew who he was or how to contact him. A few weeks later, Maria’s older sister dies and the police suspect murder. Who killed the sister?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()