Why is a river so rich ?

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 ?

What do you answer even though it never asks you questions?

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.

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?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

What question can you never answer yes to?

You can see three almost identical images below. Can you spot the odd one out from them?