If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

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?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

What can go through glass without breaking it?

What you cannot hold but it is yours?

What is the below Rebus indicate?

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?