Lớp 5
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
After the fourth test, Kenny’s average mark rise by 5 points, but after the fifth test, it drops by 9 points. If his total score in the last two tests is 122 points, how many points does he score in the last test ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
Two paths are to be constructed in a garden 5m by 5m and three plans have been submitted. If the amount of space not taken up by the paths is to be as large as possible, which of the following statements is correct ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
City B is between City A and City C. William is riding a bike from B to C, a distance of 16 km. After he has gone 6 km, Mary begins to drive a car at 60 km per hour A to C. If William continues onward, he will reach C at the same time as Mary. If he turns back, he will reach B at the same time as Mary. What is his riding speed, in km per hour ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
The eight symbols 2, 0, 1, 5, I, M, A and S are to be arranged in a row. The digits must precede the letters, and 0 cannot be in the first place. How many such arrangements are there ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
A hotel has 11 rooms and each staff member has keys to 7 different rooms. For each room, at least two staff members must hold its key. What is the minimum number of staff members the hotel must have ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
A 10 cm by 18 cm piece of paper is folded twice into a 10 cm by 4.5 cm stack of thickness 4, as shown in Figure 1. Eight 1 cm by 3 cm holes, two of which are adjacent, are cut from the stack, as shown in Figure 2. When the stack is unfolded, as shown in Figure 3, what is the area, in cm2, of this pieces of punctured paper ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
The diagram shows a 5 by 5 chessboard and an L-shaped piece which covers exactly 4 squares of the chessboard. It may be rotated or reflected. In how many ways can be it placed on the chessboard covering exactly 4 squares ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
In an election between three candidates, they are supported respectively by 10, 35 and 15 of the first 60 voters. 40 more votes are to cast, each for one of the three candidates. In how many ways can the candidate currently with 10 supporters become the uncontested winner ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
What is the value of $57.6\times \frac{8}{5}+28.8\times \frac{184}{5}-14.4\times 80$ ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
The diagram shows a point A inside a pentagon with area 20cm2. If the distance from A to each side of the pentagon is 5 cm, what is the perimeter, in cm, of the pentagon ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
What is the sum of the digits of the number whose square is equal to 15984 x 48951 ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
The usual thermometer has two scales, Celsius measured in 0C and Fahrenheit measured in 0F. If m0C is the same temperature as n0F, the conversion formula is $m\times \frac{9}{5}+32=n$. What is the value of m if m0C is the same temperature as n0F and m + n = 60 ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
The diagram shows two intersecting circles of radius 10 cm. The four areas inside each circle have the same shape and equal length. Taking $\pi $ = 3.14, what is the area, in cm2, of the shaded region which consists of 7 identical parts ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
The total number of players on three badminton teams is 29. No two players on the same team play against each other, while every two players on different teams play each other exactly once. What is the maximum number of games played ?
Hỏi lúc: 13-12-2018 14:36
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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
A class is putting up 40 rectangular posters of the same shape and size on a wall. Each poster must be held in place by one nail near each corner. Adjacent posters may overlap sligtly so that the same nail can serve to hold both of them. The diagram shows how 9 nails can hold four posters adjacent diagonally. What is the minimum number of nails required to hold all 40 posters ?
Hỏi lúc: 13-12-2018 14:36