Human: Barkley gets 10 new dog bones at the beginning of the month.  After 5 months, he has 8 bones available and has buried the rest.  How many bones has he buried? Assistant:
He gets 10 new bones, every month for 5 months so he has 10*5 = 50 dog bones
He has 8 bones available which means he has buried 50-8 = 42 bones