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

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

I have teeth but i don't bite. Who Am I ?

Why is Saturday stronger than Monday?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

How many letters are in the alphabet?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

Complete the table series riddle by finding the number that can replace "??".