1. Three people share a bag of candy. After each person eats six pieces, the total amount left by the three people is as much as that of each person. How many pieces are there in this bag of candy? 2. It takes 10 hour for the express train from Station A to bilibili and 15 hour for the local train from bilibili to Station A ... Two cars leave from two opposite stations at the same time and meet six hours later. How many miles did the two sides walk when we met? 3. There are 73 red, black and white glass balls of the same size, which are arranged in the order of 1 red ball, 2 black balls and 3 white balls. How many glass balls of three colors do you have? What color should the 68th glass ball be? 4, handle 5, there is a cuboid, 70 cm long, 50 cm wide and 45 cm high. If you want to cut into cubes of the same size, what is the longest side of these cubes? Add 30 to the numerator of 1 15. What should be added to the denominator to keep the size of the score unchanged? If 25 is subtracted from the denominator of 75 15, how much should the numerator subtract to keep the original score unchanged? 75