I am an odd number. Take away a letter and I become even. What number am I?

Solve the mathematical equation in the picture below.

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

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

What is the largest number you can write with just 3 digits?

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 ?

Find out the missing number in the picture attached:

At a Society election for president, precisely 963 votes were cast.
There is a total of 4 candidates that participate in the election.

The winning candidate exceeds the opponents by 53, 79 and 105 votes.

How many votes do each candidate gets?