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8 tháng 12 2016

Người dân có 8 cặp vợ chồng. Mỗi người đàn ông bắt tay với mọi người khác, ngoại trừ vợ của mình. Không có hai người phụ nữ bắt tay với nhau. Hỏi tổng số cái bắt tay giữa 8 người là bao nhiêu?

15 tháng 12 2016

cam on 

12 tháng 2 2017

xin chào

15 tháng 12 2016

18 nha

12 tháng 12 2016

mình làm rồi !

18 đó

30 tháng 6 2017

2 persons:  one handshake

3 persons: three handshakes

4 persons: six handshakes

.......

=> 24 - (4 . 3) : 2 = 18 (handshakes)

answer: 18 handshakes

Câu 1 :Each of cars can take 8 people. How many cars needed to take 124 people? Câu 2 : How many integer numbers between 200 and 300 are there for which the hundreds digit equals the sum of the other two digits? Câu 3 : The average of five numbers is 20. The average of the five number is 18 when one of the numbers is chaned to 4. What is the orginal value of the changed number? Câu 4 :A book has 250 pages starting at number 1. How many digits are there in the page numbers of the book? Câu 5...
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Câu 1 :Each of cars can take 8 people. How many cars needed to take 124 people?

Câu 2 : How many integer numbers between 200 and 300 are there for which the hundreds digit equals the sum of the other two digits?

Câu 3 : The average of five numbers is 20. The average of the five number is 18 when one of the numbers is chaned to 4. What is the orginal value of the changed number?

Câu 4 :A book has 250 pages starting at number 1. How many digits are there in the page numbers of the book?

Câu 5 : Find A, if A is 3 less than the average of 48; 55; 29 and A. The value of A is…

Câu 6 : The sum of denominator and numerator of a fraction is 121 and the fraction is equal to 4/7. Find the denominator of the fraction?

Câu 7 : The sum of two numbers is equal to 77. If the first number is multiplied by 8 and the second by 6, the two product are equal. The larger of these numbers is…

Câu 8 : Which is the greatest 2 - digit number divisible by 2, 3 and 4?

Câu 9 : Calculate: (1 + 2/5) x 6/7.

Câu 10 : Give the number sequence: 1, 4, 7, 10, 13, … Find the 15th term of the number sequence.

2
13 tháng 12 2018

cậu lạc đè rồi

27 tháng 12 2020

câu 1:16 ; câu 2 : ai mà biết được 

Câu 2:Mathematician Sophie Germain worked with codes and mathematics. If each letter of the alphabet is assigned a number starting with A = 1, B = 2, etc., the values of the letters in the alphabet will start to look like this:If your code is sum of the letter values, what is the value of "MATH" ?Answer: Câu 3:What is the next number in the pattern: 25, 23, 21, 19, 17, ...?Answer: Câu 4:A farmer plants 450 seeds per row in his field. How many FULL ROWS would he be able to plant with 50000...
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Câu 2:
Mathematician Sophie Germain worked with codes and mathematics. If each letter of the alphabet is assigned a number starting with A = 1, B = 2, etc., the values of the letters in the alphabet will start to look like this:

If your code is sum of the letter values, what is the value of "MATH" ?
Answer: 

Câu 3:
What is the next number in the pattern: 25, 23, 21, 19, 17, ...?
Answer: 

Câu 4:
A farmer plants 450 seeds per row in his field. How many FULL ROWS would he be able to plant with 50000 seeds?
Answer: 

Câu 5:
Your school is having a canned food drive for Harvesters. How many total cans would you have if you made a solid pyramid with  cans on the first level,  on the second level and continue the pattern all the way up to just one can on top?
Answer:  cans.

Câu 6:
Examining the operation of how to use the number of days to find the number of beans in a classroom jar is shown the table. On day 31, how many beans would be in the jar?

Answer:  beans.

Câu 7:
The 112 4-grade students at Edgemont School donate pennies to raise 75 dollar for a local charity. What is the minimum number of pennies each student needs to bring if they are to meet their goal of collecting 75 dollar?
(1 dollar = 100 pennies)
Answer:  pennies.

Câu 8:
Use the table of values to help you find the value of 9 feet in inches.

Answer: 

Câu 9:
Joel is three years younger than his brother Jaime. The sum of their ages is fifty-five. How old is Joel?
Answer:  years old.

Câu 10:
Calculate:

5
30 tháng 9 2016

Question 2: Answer: 131208 (MATH)

Queston 3: Answer: 15 ; 13 ; 11 ; 9 ; 7 ; 5 ; 3 ; 1

Question 4: Answer: 1112

Question 7: Answer: 67 pennies

Queston 8: Answer: 9 feet = 108 inch

Question 9: Answer: 26 years old

(I think the question 5 ; 6 ; 10 is not enough)

6 tháng 11 2016

Lê Minh Anh câu 2 của  bạn đúng không vậy ?

bài 1 hoàn thành việc thông qua các từ cho trước trong hộp .Vì mk k biet ve hop nen mk dat cac tu o hang ngang nhafrom      often         carpet           path              howeverpeaceful       water            fresh         flowers        forMy village is about 10 kilometers (1) _________Đà Lạt. It is a very beautiful and (2)_______place where people grow (3) ________ and vegetables only. It is very famous (4)______its pretty roses and beautiful landscapes.The air is quite...
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bài 1 hoàn thành việc thông qua các từ cho trước trong hộp .Vì mk k biet ve hop nen mk dat cac tu o hang ngang nha

from      often         carpet           path              however

peaceful       water            fresh         flowers        for

My village is about 10 kilometers (1) _________Đà Lạt. It is a very beautiful and (2)_______place where people grow (3) ________ and vegetables only. It is very famous (4)______its pretty roses and beautiful landscapes.The air is quite fresh,(5)__________,the smell of the roses makes people feel cool .In spring ,my village looks like a (6)_______with plenty of colors .Tourists come to visit ít sợ (7)_______.Nowadays,with electricity,it doesn't take the villagers much time to (8)_____the roses.And even at night ,people can walk along the (9)______and enjoy the (10) _______smell of the flowers.

Xong bai 1 ti mk goi bai 2 ai tra loi nhanh nhat mk like

2
27 tháng 11 2016

1. from 2. peaceful 3.flowers  4.for 5. however     6. carpet 7. often 8.water 9. path 10.fresh 

27 tháng 11 2016

1. from

2. peaceful

3. flowers

4. for

5. however

6. carpet

7.  often

8.  water

9. path

10.  fresh