3) A monkey planted a bunch of peaches to eat. On the first day, it ate a seventh of this pile of peaches. On the second day, it ate the remaining sixth, on the third day, it ate the remaining quarter, on the fifth day, it ate the remaining third, and on the sixth day, it ate the remaining half. At this time, there are 12 peaches left. So, how many peaches did * * * eat on the first day and the second day? 12( 1- 1/2)； ( 1- 1/3)； ( 1- 1/4)； ( 1- 1/5)； ( 1- 1/6)； (1-65438 How many kilometers can ordinary people run by bike? 20× 3 = 60 60 ÷ 5 = 12km5) There are two cups of the same size, and each cup contains 150ml of coffee and milk. First, pour 20 ml of coffee from the coffee cup into the milk cup and stir well; Then pour 20 ml of the mixture from the milk cup into the coffee cup and stir well. Repeat this twice and ask if there is more coffee in the milk cup or more milk in the coffee cup. Because exchange is equal.