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

Can you find a number that lies one third of the distance between 1/3 and 2/3?

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

? : 3839 :: 11 : 1209

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

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

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 ?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

I am working in a bus company. The company recently went under expansion and therefore there was not enough room for all the buses. As a result, twelve buses had to be stored outside.

If the company decides to expand the garage space by forty percent, enough space to accommodate the current buses will be created leaving enough space for twelve more buses if the need arises in future.

Can you calculate the number of buses that the company owns at present?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?