Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

What will you call your mother's brother's brother-in-law?

How many letters are in the alphabet?

I am quite hot but become too cold if you remove the first two letters. What am I?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

There is something which is always coming but never arrives?

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