Question: Every year, four clowns and thirty children go on a carousel. This year, the candy seller, at the carousel, had 700 candies. The candy seller then sold 20 candies, to each of the clowns and the children, who attended. How many candies did he have left? Think carefully first, then make a decision:
Since there are four clowns at the carousel this year, the candy seller sold 20 * 4 = 80 candies to all the clowns. The thirty children also bought 20 * 30 = 600 candies in total. Altogether, the candy seller sold 600 + 80 = 680 candies to the clowns and children at the carousel. The number of candies the candy seller has left is 700 - 680 = 20. So the answer is 20.