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.

Find the value of "?" in the ball picture Riddle below:

What does does this rebus picture means ?

What is full of holes but still holds water?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

How many triangles can you find in this given picture?

Why is 6 afraid of 7?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?