How do you go from 98 to 720 using just one letter?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

Count the number of balls in picture below:

What seven-letter word has hundreds of letters in it?

What is more useful when it is broken?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

Find the Goldfish below the given Image.

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

They are three errirs in this question. Can you find them?