A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Why do you find that most of the buildings are deprived of the 13th floor?

I am a mother. However, I never give birth.

I am a father. However, I never nurse my children.

Wandering is not possible for me, but standing still happens occurs rarely.

Who am I?

In the four images below, can you find the odd one out?

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

They are three errirs in this question. Can you find them?