What goes up but never comes down?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

It belongs to you, but other people use it more than you do. What is it?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

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?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Can anyone tell me a word in the English dictionary which has a silent 'z'?