Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

What month of the year has 28 days?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

With the help clues provided in the image, can you find the 5 digit key?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

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

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

It is always ahead of me yet I can never see it. What is it?

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside. The man said, "Oh! I am really sorry, I thought this was my room." He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man. What made her suspicious of that man? He might have been genuinely mistaken.