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There are 5 teams participating in the math team. The total score is 144 points 5 team and it's interesting that the 5 teams have achieved one of three prizes : Best ( 30 points ) ; second ( 29 points ) ; Three ( 28 points ) . Prove the team than the team won three first prize right one team .
sson 1. Lan in the apartment number? Lan house is in an 8 storey house, each floor has 8 apartments. One day, the class asked Lan: What is your house in the apartment? Ask me some questions, I will answer all your questions, but just say yes or no. Through these questions you try to figure out how many in the apartment Huy said: I will ask, are you in the apartment number 1, number 2, ..., No. 63. So with most 63 questions you will know which apartment you. You say, I only need 14 questions, 7 s...
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sson 1. Lan in the apartment number? Lan house is in an 8 storey house, each floor has 8 apartments. One day, the class asked Lan: "What is your house in the apartment?" "Ask me some questions, I will answer all your questions, but just say" yes "or" no. "Through these questions you try to figure out how many in the apartment" Huy said: "I will ask, are you in the apartment number 1, number 2, ..., No. 63. So with most 63 questions you will know which apartment you. You say, "I only need 14 questions, 7 sentences enough to know what floor you are on and 7 you can know exactly what you are in the apartment." Dear children, I have to ask several times to know. How are you Lan in the apartment?
Lesson 2. Game together across the bridge. Four people need to cross a bridge. Because of the weak demand, each time we go not more than two people, and because it is dark, we have to take the light. Four people walk differently, crossing the bridge with corresponding time of 10 minutes, 5 minutes, 2 minutes and 1 minute. Since there is only one lamp, each passage must be carried back to the next person. When two people go together, cross the bridge with a slower time. The following example is a way to go: - 10 minutes to go with people 5 minutes to bridge, 10 minutes to take. - 5 minutes to take the lamp back, take 5 minutes. - 5 minutes to go with people 2 minutes through the bridge, It takes 5 minutes. - 2 minutes to take the lamp back, take 2 minutes. - 2 minutes with people 1 minute over the bridge, take 2 minutes. Total time is 10 + 5 + 5 + 2 + 2 = 24 minutes. Let's try to get away with a little less time as possible, and if less than 19 minutes is great
Lesson 3. Cashmere. Mallard buys 27 apples that are identical in size and volume. However, the salesman said that of the apples on the right is a slightly lighter weight. You use a table scales on both sides to find the apple that light. The minimum number of weighs required. Let's help you find that little apple. If they find that fruit after less than 5 weightings, then it is good.
There are 8 girls on each basketball team .There are 184 girls in the league.How many teams are there ?
For a grid of 10 lines and 10 columns. Two children and children coloring boxes, each one a color in three colors: blue, red, purple. Credit: "Every time we finish the cells there are two lines on the two lines that have a color number of this cell line by the number of cells in the other." Nhi said: "I discovered there are always two columns are painted like that."
Come on, tell who is right, who's wrong?
team's Ted plant each some trees. Each year the trees team plant are equal to the number of the trees team planted in the previous to year. In 2020 team planted 2145 trees and in 2021 team planted 3428 trees. How many trees did team plant in 2018?
There are 42 students in Grade 5. Each student has to choose at least 1 favorite ballgame between basketball and volleyball. There are 29 students like playing basketballand 28 students like playing volleyball.Find the number of students who likeboth ballgames.Dịch tiếng Việt:Có 42 học sinh lớp 5. Mỗi học sinh phải chọn ít nhất 1 trò chơi bóng ưa thích giữa bóng rổ và bóng chuyền. Có 29 học sinh thích chơi bóng rổ và 28 học sinh thích chơi bóng chuyền. Tìm số học sinh thích chơi cả 2 môn bóng.Kè...
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There are 42 students in Grade 5. Each student has to choose at least 1 favorite ballgame between basketball and volleyball. There are 29 students like playing basketballand 28 students like playing volleyball.Find the number of students who likeboth ballgames.
Dịch tiếng Việt:
Có 42 học sinh lớp 5. Mỗi học sinh phải chọn ít nhất 1 trò chơi bóng ưa thích giữa bóng rổ và bóng chuyền. Có 29 học sinh thích chơi bóng rổ và 28 học sinh thích chơi bóng chuyền. Tìm số học sinh thích chơi cả 2 môn bóng.
Kèm lời giải thích nhé!
There are 4n pebbles of weights 1, 2, 3, . . . , 4n. Each pebble is coloured in one of n colours and there are four pebbles of each colour. Show that we can arrange the pebbles into two piles so that the following two conditions are both satisfied:
• The total weights of both piles are the same.
• Each pile contains two pebbles of each colour.
A block of flat has 45 flats with 115 rooms. There are 3 kinds of flats: the double room flat, three room flat and four room flat. Know the double room flat is twice as much as three room flat. How many flats are there each kind.
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Number 1 : M.r A is going with an old-human to see M.r B. M.r B said : Who is that ?. M.r A said : My wife s father has one brother and one sister and this old-human s husband-sister is my wife s aunt. Who is that ?Number 2 : Two people are playing a game with ten marbles. Each time, one people can take 1 - 3 marbles. If you the player and you play first, what do you play then you win ?Number 3 : A man is going with a woman. A human see them and said : Hello, two couple. Have a nice day! The man...
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Number 1 : M.r A is going with an old-human to see M.r B. M.r B said : Who is that ?. M.r A said : My wife' s father has one brother and one sister and this old-human' s husband-sister is my wife' s aunt. Who is that ?
Number 2 : Two people are playing a game with ten marbles. Each time, one people can take 1 -> 3 marbles. If you the player and you play first, what do you play then you win ?
Number 3 : A man is going with a woman. A human see them and said : Hello, two couple. Have a nice day! The man said : No, we aren' t couple. But her great-grandmother is my great-grandmother, too. What correlated from the man to the woman ?