How many times in a given day, minutes and hour clock comes in a straight line ?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. 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.....)

Consider this: Arnold Schwarzenegger has a big one. Michael J. Fox has a small one. Prince doesn’t have one. The Pope has one but never uses it. Bill Clinton has one and uses it all the time. What is it?

What has to be broken before you can use it?

What's a single-digit number with no value?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

What is always in front of you but can’t be seen?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?