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

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Who are the happiest people in IPL match?

What is the end of everything?

Name a key which is hardest to turn.

Can you count the number of blocks in the picture below?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Can you count the number of squares in the given picture?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

What is the below Rebus indicate?