My father, brother and sister are all 64 years old now. When my father was three times as old as my brother, my sister was nine years old. When my brother is twice as old as my sister, my father is 34 years old. How old are they now?
The sum of the ages of Party A, Party B, Party C and Party D is 64 years old. When Party A is 2 1 year old, Party B is 17 years old. When A/Kloc-0 was 8 years old, C was three times that of D. How old is D now?
It takes 20 days for Party A to do a job alone, and 12 days for Party B to do a job alone. If this work is done by Party A for a few days and then by Party B, and both teams need 14 days, how many days does Party A need?
Party A and Party B walk in opposite directions on the same highway at the same time. Party A's speed is three times that of Party B. Party A passes the post office at 8: 30 in the morning and Party B passes the post office at 10: 30 in the morning ... and asks, "When did Party A and Party B meet on the road?"
A project takes 18 days, which is completed by team A and team B. During the cooperation period, team A stopped work for 8 days, resulting in a total of 23 days for the project. How many days will it take if Team B finishes it alone?
A project needs 12 days for Team A and 9 days for Team B. If Team A works for 5 days, how many days does it take for Team A and Team B to work together?
Hongshicun Primary School is divided into 6 groups, with 4 people in each group and 360 trees. How many trees are watered per person on average?
There are three times as many eggs in the box as in the basket. There are 96 eggs in a box. How many eggs are there in six baskets?
The average speed of a train before speed increase is 7 1 km, and it takes 12 hours from Qinhuangdao to Handan. After speeding up, the average speed is 95 kilometers per hour. How many hours does it take from Qinhuangdao to Handan after speeding up?
Aunt Wang is an expert in making children's clothes. She can make 75 sets of children's clothes a week. Now the working week is five days. (1) According to this calculation, how many sets can 15 make? How many days does it take to make 120 sets of children's clothes?
The coach from Beijing to Qingdao passes through Tianjin and Jinan. It departs from Beijing at 6: 30 in the morning with an average speed of 85 kilometers per hour. When does it arrive in Qingdao? 137km； From Beijing to Tianjin; 360km from Tianjin to Jinan; Jinan to Qingdao is 393 kilometers.
There are 960 teachers and students in Sunshine Primary School, and 60 tons were used in June.
(1) How many tons of water does the school use on average every day?
(2) According to this calculation, how many people can use 1 ton of water for one day? How about a month?
125 male students and 1 19 female students were led by three teachers to visit the history museum. During the visit, they can only enter in batches, with a maximum of 50 people allowed at a time. How many batches at least?
A story book has 448 pages. Obviously, it took 16 days to read it. Fangfang reads 4 pages more than Mingming every day. How many pages does Fangfang read every day?
In order to carry out sports activities, the class pays for playing basketball and volleyball. It is known that it costs 16 1 yuan to buy three basketballs and two volleyballs. If you spend 245 yuan to buy three basketballs and five volleyballs, how much is a basketball? How much is a volleyball?
Yao Ming is a child who loves to learn. He does some oral arithmetic problems every day except Sunday. If he does 300 words a week, according to this calculation,
(1) How many courses can I do in three weeks?
(2)650 questions can be completed in a few days?
A titmouse can eat about 800 pests in 5 days. According to this calculation, how many pests can a titmouse eat in a month? A month is 30 days. )
A bus travels for 3 hours 174 km. At this speed, how many kilometers can 12 hour travel?
Grandpa Zhang bought three lambs and spent 75 yuan. He wants to buy five more lambs. How much will it cost?
Five boxes of bees can brew 375 kilograms of honey a year. Kobayashi keeps 12 boxes of such bees. How many Jin of honey can you brew a year?
Yu Ying Primary School 180 Young Pioneers help military families to do good deeds on "Love Day". These young pioneers are divided into five teams on average, and each team is divided into four groups. How many young pioneers are there in each group on average?
Uncle Liu took 700 yuan to buy fertilizer, bought 16 bags of fertilizer, and left 60 yuan. What's the price of each bag of fertilizer?
Eggs collected in Chunya Chicken Farm on Monday are packed in a box 18kg. After 8 cases are packed, there is 16kg left. How many kilograms of eggs were collected on Monday?
Uncle Wang drove from the county seat to Wangzhuang to deliver fertilizer. I walked 40 kilometers per hour for three hours when I went there, and only two hours when I came back. How many kilometers per hour did you average when you came back?
The school will add two new books in the library, each with three sets. It is known that each set of children's encyclopedias 125 yuan, and each set of mathematical conjectures 18 yuan. * * * How much?