A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

Why is the Hole below a Lock?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

A father's child, a mother's child, yet no one's son.

Who am I?

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?