Answer: 62 1
2. There are 180 white pieces and 18 1 black pieces in a box. Where is the white chess piece of 18 1? Zhang Yu randomly draws two pieces from box A at a time. If the two pieces are the same color, he takes out an albino from box B and puts it in box A; If the two pieces are different colors, he will put the sunspot home. How much did he take? After that, there is only one piece left in the armor box.
Answer: No matter what kind of chess pieces are taken out of the armor box, there is one missing from the armor box. The original 36 1 in the armor box was missing one at a time, and one remained after 360 times.
Grandpa is seven times as big as Mingming now, six times as big as him in a few years, five times, four times and three times as big as him in a few years. Ask grandpa how old he is now.
Answer: 70 years old
There are three kinds of drinks and 65 bottles of three kinds of drinks. On average, two people drink a bottle of A drink, three people drink a bottle of B drink and four people drink a bottle of C drink. How many people attended the party?
Answer: 60 people
There are several trained militiamen in the queue. Only the number is (90- 1 10), there is no surplus in the third row, less than two in the fifth row and less than four in the seventh row. * * How many militia are there?
Answer: 102 people
6. Buying books with 2 16 yuan just ran out of money. If the price of each book is reduced by 1 yuan, you can buy three more books, which just runs out of money. * * * How many books did you buy?
Answer: 24 books
7. 100m Plant a tree every 2 meters on both sides of the road. These trees are planted from one end of each side according to the rule of planting two fir trees first and then 1 willow tree. How many willows are there in these trees?
Answer: 34 trees
8. Choose 1 from 9 students as the monitor and 4 as the team leader. How many ways can I choose a * *?
Answer: 630 kinds.
9. The clerk changed a 5 yuan and a 50-cent RMB into 28 RMB with face value of 1 yuan and 1 minute. How much RMB do you want in return?
Answer: There are three Zhang Yiyuan bills and 25 dimes.
1There are 400 movie tickets in 0.3 yuan, 5 yuan and 7 yuan. A * * * value of 1920 yuan, in which 7 yuan and 5 yuan tickets are equal. How many movie tickets are there for each of the three prices?
Answer: 3 yuan has 160, and 7 yuan and 5 yuan have 120.
Typing is too tired ... just 10 ... flash ... ~ \ (≥ ▽≤)/~!
Very tired