I have teeth but i don't bite. Who Am I ?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

John has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl.
How can He do it?

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?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

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

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Count the number of squares in the picture below.

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?