What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

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

There is something which you can be arrested for attempting but not for successfully completing.

How can you leave a room with two legs and return with six legs?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

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

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

A man was just doing his job when his suit was torn. Why did he die three minutes later?