There once was a lonely Christmas tree. It was in the middle of a field, all alone. Our tree once had 250 lights burning bright. Once the loneliness set in, there were only 164 lights still on. How many lights have gone dark on our lonely tree?
Kristin played five basketball games. In the games she scored 12, 17, 8, 23, and 15 points. How many points did she average in those five games?