81 x 9 = 801. What must you do to make the this equation true?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Can you count the number of squares in the figure below?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

who is silent in the parliament?

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

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

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?