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Câu hỏi của Vinastudy - Hệ Thống Giáo Dục Trực Tuyến - Toán lớp 5 | Học trực tuyến
The first term of a sequence is 2. Each subsequent term is the remainder when 3 times the preceding term is divided by 5. Thus the second term is 1, the remainder when 3 x 2 = 6 is divided by 5. How many of the first 2015 terms of this sequence are equal to 1 ?
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 cubic box of side length 15 cm has two holes. One of them is 5 cm above and 5 cm to the left of the bottom right corner of the front face. The other is 5 cm below and 5 cm to the left of the top right corner of the right face. The size of the holes and the thickness of the box are negligible. If the box is filled with water and one of its faces rests on a horizontal surface, some water will leak out through the holes. What is the maximum amount, in cm3, of water that can remain inside the box ?
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
Goldie has two identical gold coins and Sylvia has three identical silver coins. They total weight of Goldie’s coins is equal to the total weight of Sylvia’s coins. If they trade one coin with each other, then the total weight of Goldie’s coins is 12 grams less than the total weight of Sylvia’s coins. What is the weight, in grams, of each gold coin ?
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
Jasmine tea sells for 320 dollars per kg while Oolong tea sells for 480 dollars per kg. A mixture consisting of 3 parts of Jasmine tea to 5 parts of Oolong tea sells for 450 dollars per kg. What is the maximum amount, in dollars, for which 10 kg of each of Jasmine tea and Oolong tea may be sold ?
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
Which of the following boxes has a net as shown in the diagram below ?
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
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