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

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What can jump higher than a building?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

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

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

You need to remove two matchsticks to make the below equation true. Can you do it ?

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?