Replace the question mark with the correct number below.

Can it be possible to build a house that has all its four walls facing towards the South?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

What does it mean?

Can you find the key in the picture below?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

What can go through glass without breaking it?

An old Woman left INR 33,333 to be divided equally among two fathers and two sons and each was to receive INR 11,111.
How was this possible?