in 3 years' time, the sum of the ages of a and b will be 27. b' s age is the difference between his own and a's ages. how old is b? mọi người giúp mình nhé mình đang cần gấp ý. Mình cảm ơn nhiều ạ!
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Giải nhanh giúp mình nhé:
There are four kids.If we computer the total ages of three of them at a time, a sums are 21, 24, 30 and 27 respectively. What is the difference in age between the oldest and the youngest among there four kids?
there are four kids.If we compute the total ages of three of them at a time, the sums are 22,20,17,25 respectively. What is the difference in age between the oldest and the youngest among is four kids.
Giúp mình nhé <3
. Câu hỏi :
Hỏi đứa trẻ lớn nhất hơn đứa trẻ nhỏ nhất bao nhiêu tuổi .
25 - 17 = 8 ( tuổi )
đ/s : 8 tuổi
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Bài 1: Joel is 8 years old. His mother is 34 years old. In how many years' time will his mother's age be three times Joel's age ?
Bài 2: The average of A and B is 20. The average of B and C is 15. The average of C and D is 18. Find the average of A and D ?
( Giải giúp mk với)
bài 2:đáp án là 50
câu 1 thì mk k bt làm
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Bài 1: Joel 8 tuổi. Mẹ của cậu 34 tuổi. Hỏi trong bao nhiêu năm nữa, tuổi của của mẹ cậu gấp ba lần tuổi của Joel?
Giải:
Gọi số năm là x => tuổi của mẹ trong x năm là 34 + x; tuổi của Joel trong x năm là 8 + x.
Mà trong x năm tuổi mẹ gấp 3 lần tuổi Joel
=> 34 + x = 3 * (8 + x)
<=> x = 5
Vậy đáp án là 5 năm.
donald trump has 10 grandchildrens all of difference ages. Anna is the eldest. The sum of ages of all grandchildrens is 190. At least how old is Anna?
A.24 B.20 C.25 D.19
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the sum of the age of a football coach anh his two members is 100. His age will be the sum of the two members in 12 years time. How old is the football coach?
Dịch : Tổng số tuổi của một huấn luyện viên bóng đá và hai thành viên của anh ấy là 100. Tuổi anh ấy sẽ bằng tổng số tuổi của hai thành viên trong 12 năm nữa. Hỏi huấn luyện viên bóng đá bao nhiêu tuổi?
Giải
Tổng số tuổi của huấn luyện viên bóng đá và hai thành viên của anh ấy sau 12 năm nữa là:
100 + 12 + 12 + 12 = 136 (tuổi)
Tuổi của anh ấy sẽ bằng tuổi của 2 thành viên khi 12 năm nữa có nghĩa là 12 năm nữa tổng số tuổi sẽ gấp 2 lần anh ấy.
Tuổi của huấn luyện viên bóng đá sau 12 năm nữa là:
136 : 2 = 68 (tuổi)
Tuổi của huấn luyện viên bóng đá là:
68 - 12 = 56 (tuổi)
ĐS : 56 tuổi
Chúc bạn hok tốt nha!
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Jim’s present age is one fifth of his mother’s age. After 7 years, the ratio of their ages will become 1 : 3. How old is his mother now?
Given that the sum of the ages of A and B is 56, and A is 28 years older than B. Find the ages of A and B
Choose the sentence (A, B, C or D) that is closets in meaning to the root sentence.26. How old is he?A. What is his age?C. How many ages does he have?27. My teacher’s hair is straight and black.A. My teacher has straight and black hair.B. My teacher has a black straight hair.C. My teacher has a straight black hair.D. My teacher has a black straight hair.28. Cau Giay Park has many green trees.A. There are a lot of green trees in Cau Giay Park.B. There is a lot of green trees in Cau Giay Park.C. W...
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Choose the sentence (A, B, C or D) that is closets in meaning to the root sentence.
26. How old is he?
A. What is his age?
C. How many ages does he have?
27. My teacher’s hair is straight and black.
A. My teacher has straight and black hair.
B. My teacher has a black straight hair.
C. My teacher has a straight black hair.
D. My teacher has a black straight hair.
28. Cau Giay Park has many green trees.
A. There are a lot of green trees in Cau Giay Park.
B. There is a lot of green trees in Cau Giay Park.
C. We have many green trees in Cau Giay.
D. We plant a lot of green trees in Cau Giay School.
29. There are many pictures below the clock in my dining room.
A. The clock is in front of many pictures in my dining room.
B. My dining room has a clock among many pictures.
C. The clock is above a lot of pictures in my dining room.
D. We have a dining room with many pictures in the middle of the clock. 30. His favourite subjects at school is Mathematics.
A. He likes many subject at school, especially Mathematics.
B. Mathematics is the subject he likes.
C. He is very good at Mathematics.
26. How old is he?
A. What is his age?
C. How many ages does he have?
27. My teacher’s hair is straight and black.
A. My teacher has straight and black hair.
B. My teacher has a black straight hair.
C. My teacher has a straight black hair.
D. My teacher has a black straight hair.
28. Cau Giay Park has many green trees.
A. There are a lot of green trees in Cau Giay Park.
B. There is a lot of green trees in Cau Giay Park.
C. We have many green trees in Cau Giay.
D. We plant a lot of green trees in Cau Giay School.
29. There are many pictures below the clock in my dining room.
A. The clock is in front of many pictures in my dining room.
B. My dining room has a clock among many pictures.
C. The clock is above a lot of pictures in my dining room.
D. We have a dining room with many pictures in the middle of the clock. 30. His favourite subjects at school is Mathematics.
A. He likes many subject at school, especially Mathematics.
B. Mathematics is the subject he likes.
C. He is very good at Mathematics.
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Điền giới từ vào .... : Before / under / out / between / of
Even before he is born,, a baby has small teeth ……………… his gums . At about the age……………… six months, he first tooth starts to grow. ……………… the young child is threeyears old, he has twenty small teeth. ……………… the ages of six and twelve, a second set ofteeth form in the gum below the first teeth and push them
Điền giới từ vào .... : Before / under / out / between / of
Even before he is born,, a baby has small teeth ………under……… his gums . At about the age…………of…… six months, he first tooth starts to grow. …………Before…… the young child is threeyears old, he has twenty small teeth. ………Between……… the ages of six and twelve, a second set ofteeth form in the gum below the first teeth and push them
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