###Human: Marcus has three times as many cheese crackers as Mona.  Nicholas has 6 more crackers than Mona.  If Marcus has 27 crackers, how many crackers does Nicholas have?, ### Assistant: Mona has 27 / 3 = 9 cheese crackers.
Nicholas has 9 + 6 = 15 cheese crackers. 
 So the answer is :  15