What number when divided in half becomes zero?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

Through your logical capabilities, can you make 7 an even?

Which point will the car reach to go out?

What has a ring but no finger?

What is so fragile that saying its name breaks it?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Replace the question mark with the correct number below.

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)