What does this Rebus Picture means ?

Can you guess the name of the month by looking the below rebus ?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

How many letters are in the alphabet?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

Which letter of the alphabet has the most water?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

I taste better than I can smell. Who am I?

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