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Peter, Bob and Jack do a work. If they work in pairs: Peter and Bob can complete it in 12 hours; Bob and Jack can complete it in 10 hours; Jack and Peter can complete it in 15 hours. Peter needs ........ hours to complete this work by himself.
Peter, Bob and Jack do a work. If they work in pairs: Peter and Bob can complete it in 12 hours; Bob and Jack can complete it in 10 hours; Jack and Peter can complete it in 15 hours. Peter needs ........ hours to complete this work by himself.
1.Peter, Bob and Jack do a work. If they work in pairs: Peter and Bob can complete it in 12 hours; Bob and Jack can complete it in 10 hours; Jack and Peter can complete it in 15 hours. Peter needs ........ hours to complete this work by himself.
2.The product of 2 natural numbers is 2015. Find the smallest possible sum of these two numbers?
Answer: The smallest possible sum of these numbers is ...............
Peter, Bob and Jack do a work. If they work in pairs: Peter and Bob can complete it in 12 hours; Bob and Jack can complete it in 10 hours; Jack and Peter can complete it in 15 hours. Peter needs ........ hours to complete this work by himself.a. 18b. 40c. 24c. 42Peter, Bob và Jack cùng làm một công việc. Nếu họ làm theo cặp: Peter và Bob có thể hoàn thành nó trong vòng 12 giờ; Bob và Jack có thể hoàn thành trong 10 giờ; Jack và Peter có thể hoàn thành trong 15 giờ. Peter cần ......... giờ để một...
Đọc tiếp
Peter, Bob and Jack do a work. If they work in pairs: Peter and Bob can complete it in 12 hours; Bob and Jack can complete it in 10 hours; Jack and Peter can complete it in 15 hours. Peter needs ........ hours to complete this work by himself.
a. 18b. 40c. 24c. 42Peter, Bob và Jack cùng làm một công việc. Nếu họ làm theo cặp: Peter và Bob có thể hoàn thành nó trong vòng 12 giờ; Bob và Jack có thể hoàn thành trong 10 giờ; Jack và Peter có thể hoàn thành trong 15 giờ. Peter cần ......... giờ để một mình hoàn thành công việc này.
Peter,Bob and Jack do a work.If they work in pairs:Peter and Bob can complete if in 12 hours;Bob and Jack can complete it in10 hours;Jack and Peter can complete it in 15 hours.Peter need hours to complete this work by himself.
There are 3 children in a family,Jack,Mary and Peter.Mary can clean the house for 1 hour.Jack can do thesame job for 2 hours and Peter needs 6 hours.If theydo the job together then they need ................ minutes.
1.Three pumpkins are weighed in pairs in all possible ways. The weights of all these pairs are 8kg, 9kg and 11kg. How much does the lightest pumpkin weight? 2.It takes Jack 42 minutes to cut a long log of wood into seven pieces. How long will it take him to cut that log of wood into nine pieces?3.The sum of two fractions 1/2 and 1/3 is a fraction with denominator of 12. Find its numerator4.The floor of a rectangular room is covered with square tiles. The room is 24 tiles long and 16 tiles wide....
Đọc tiếp
1.Three pumpkins are weighed in pairs in all possible ways. The weights of all these pairs are 8kg, 9kg and 11kg. How much does the lightest pumpkin weight?
2.It takes Jack 42 minutes to cut a long log of wood into seven pieces. How long will it take him to cut that log of wood into nine pieces?
3.The sum of two fractions 1/2 and 1/3 is a fraction with denominator of 12. Find its numerator
4.The floor of a rectangular room is covered with square tiles. The room is 24 tiles long and 16 tiles wide. The number of tiles in the outer border of the floor is ?
5.The average of 4, 8, X and 13 is 8. The value of X is ?
6.How many zero digits are there in ten million?
7.Fill the missing number in the blank
44444 = 40000 +400+ ............ + 4
8.There are 3 children in a family,Jack,Mary and Peter.Mary can clean the house for 1 hour.Jack can do thesame job for 2 hours and Peter needs 6 hours.If theydo the job together then they need ........... minutes.
9.MNPQ is a square that is made up of two identical rectangles and two squares of area 9 and 16CM2 . The area of the square MNPQ is ? CM2
TO SE TICK CHO AI NHANH VA DUNG
Peter,Bob và Jack làm 1 công việc.Nếu họ làm việc theo cặp:Peter và Bob có thể hoàn thành nó trong 12 giờ;Bob va Jack có thể hoàn thành nó trong 10 giờ;Jack và Peter có thể hoàn thành nó trong 15 giờ.Hỏi Peter cần bao nhiêu giờ để hoàn thành công việc này một mình
Toán nâng cao lớp 4:
Peter,Jack và Bob làm một công việc. Pêtr, Bob có thể hoàn thành nó trong 12 giờ, Jack và Bob có thể hoàn thành nó trong 10 giờ, Jack và Peter có thể hoàn thành nó trong 15 giờ. Peter cần bao nhiêu giờ để hoàn thành công việc này một mình?
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