How many words can a pen with half refill write?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Replace The Question Mark Below With the Correct Number.

2 {38} 3
4 {1524} 5
6 {3548} 7
8 {????} 9

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 ?

Which is the correct shadow of the bird?

What is at the end of a rainbow?

Can you count the number of children in the picture below