1 Natural stone tiles of marble, granite, slate or more start at $2 a square foot, or $200 for 10x10-feet, but costs climb rapidly for custom designs or special orders.  Mosaics are any tile less than two inches square (although they can be round or hexagonal), usually mounted on a 12x12-inch mesh sheet.
Definition of problem-solving. : the process or act of finding a solution to a problem Let's do some problem-solving and see if we can't figure out what to do. problem-solving skills.
mystery, problem, enigma, riddle, puzzle mean something which baffles or perplexes. mystery applies to what cannot be fully understood by reason or less strictly to whatever resists or defies explanation. the mystery of the stone monoliths problem applies to a question or difficulty calling for a solution or causing concern.