Can you count the number of quadrilaterals in the picture below?

What does this Rebus Picture means ?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

How can you write nineteen in a manner that if we take out one, it becomes twenty?

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

I can be cracked, made, told, and played. What am I?

Who is that with a neck and no head, two arms and no hands? What is it?

Can you find the 09 errors in the picture below?

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?