How can you make 16 dollars using exactly and only 3 bills, one of which is not a 10-dollar bill?

That would be by using a $1 bill, a $5 bill, and a $10 bill. Either the $1 bill or the $5 bill qualify as the "one of which is not the $10 bill". It's a matter of translating the question.

C. i possibility the answer to this