There are four natural numbers a, B, C, D, the sum of which is not more than 400, and a divided by B quotient 5 more than 5; a divided by C quotient 6 more than 6; a divided by D quotient 7 more than 7. What is the sum of these four natural numbers______ .

There are four natural numbers a, B, C, D, the sum of which is not more than 400, and a divided by B quotient 5 more than 5; a divided by C quotient 6 more than 6; a divided by D quotient 7 more than 7. What is the sum of these four natural numbers______ .

The quotient of a divided by B is more than 5, so a = 5B + 5, so a is a multiple of 5; similarly, the quotient of a divided by C is more than 6, and the quotient of a divided by D is 7 divided by 7, then a is a multiple of 6 and 7. The least common multiple of 5, 6 and 7 is 5 × 6 × 7 = 210, and not more than 400, then a < 400, and 2 times of 210 is more than 400, so a = 210, B = (210-5) △ 5 = 4
Who has a mathematical problem about the least common multiple and the greatest common factor
Note that what I want is the original question, not the answer. Remember, don't attach the answer. I have to rely on my own actual level to do it. Five minutes, one will do
3. The greatest common factor of two natural numbers a and B is 1, and their least common multiple is ()
5. A number is a multiple of 3, a multiple of 5, and a factor of 7. The minimum number is ()
8. If the greatest common factor of two numbers is 1 and their least common multiple is 91, then the maximum sum of the two numbers is ()
After answering the above questions, please help me to see if I have done it right
1. The factor of 18 is (), the factor of 24 is (), and their common factor is ()
2. The maximum factor of a number is 13, and the minimum multiple of the number is (13)
4. If a = 2 × 2 × 3, B = 2 × 3 × 3, then their greatest common factor is (), and their least common multiple is ()
6. A number is not only a factor of 30, but also a factor of 45
7. In all the three digits arranged by 0, 1 and 2, the number that is a multiple of 2, 3 and 5 is ()
Several mathematical problems, the greatest common factor and the least common multiple
The greatest common factor of 6 and 7. The least common multiple of 6 and 7. The least common multiple of 5 and 20. The least common multiple of 8 and 12. The least common multiple of 9 and 15
The greatest common factor of 6 and 7 is 1
The least common multiple of 6 and 7 42
The least common multiple of 5 and 20 is 20
The least common multiple of 8 and 12 24
The least common multiple 45 of 9 and 15
I hope my answer is useful to you, and I hope it can be accepted as a satisfactory answer in time
The least common multiple 42 of 6 and 7, the least common multiple 20 of 5 and 20, the least common multiple 24 of 8 and 12, the least common multiple 29 and 15. Forty-five
The greatest common factor of 6 and 7 is 1
The least common multiple of 6 and 7 42
The least common multiple of 5 and 20 is 20
The least common multiple of 8 and 12 24
The least common multiple 45 of 9 and 15
（6,7）=1
[6,7]=42
[5,20]=20
[8,12]=24
[9,15]=45
Which quadrant is the corresponding point of complex z = I △ 1 + I in the complex plane
Are you missing a bracket? Z = I / (1 + I) = (I + 1) / 2, in the first quadrant
What are the plural forms of cake, fish, fruit and bread in English?
1. A cake: countable, a cake, two cakes;
When a cake is chopped or divided into small pieces, it can not be counted;
2. Fish, live fish, countable, focusing on "the number of fish", that is Two people / sheet / deer, etc
So: a fish, two fish, many fish
If we focus on the "species of fish", that is, all kinds of fish can still be counted, but the plural form should add "- es",
A (kind of) fish
Two (kinds of) fishes
But the cooked fish is not to be counted. We can only say: a little / some / much / a lot of + fish (not 'fish')
3. Fruit is not countable when it refers to "fruit" in general;
When we emphasize "all kinds of fruits", we can count them and add - S;
4. Bread, itself forever: uncountable
If we want to express a certain quantity, we must use a specific "Quantifier" to express it
a piece of bread; two pieces of bread;
a loaf of bread; two loaves of bread,etc.
For example, when there is only one kind of fruit, but there are a lot of strawberries, if there are only strawberries, use the singular; if there are many kinds of fruit, for example, there are strawberries, bananas, pears on the table today In the plural fruits
Given the complex z = 2-I / 1 + I, in the complex plane, which quadrant is the point corresponding to Z
Z=(2-i)/(1+i)
=(2-i)(1-i)/(1+i)(1-i)
=(1-3i)/(1+1)
=(1-3i)/2
Then Z is in the fourth quadrant
Here is nice backpack this is my book
Those are his parents
Yes it is
Today, the sooner the better!
Here is a nice backpack.These are my books.
Are those his parents?No,they aren't.
Yes,they are.
The point corresponding to the complex number Z = I · (1 + I) (I is an imaginary number unit) on the complex plane lies at the second point______ Quadrant
∵ I (1 + I) = I + I2 = - 1 + I, ∵ I (1 + I) means that the complex number is - 1 + I, ∵ the corresponding point (- 1,1) of - 1 + I in the complex plane is in the second quadrant
There is a box here. 2look! A woman doctor is coming here. 3This is my teacher
There are some boxes
look some women doctors are coming here
Those are our teachers
If you don't understand, ask again. If it helps you, please don't forget to adopt it
1.There are boxes here
2.Look!women doctors are coming here.
3.These are my teachers
I hope my answer can help you_ O ha! Continue to ask me if you don't understand~
In the complex plane, which quadrant is the point of complex number - 2 + 3I / 1-4i
--2+3i/1-4i=(--2+3i)(1+4i)/(1--4i)(1+4i)
=--14/5--i
The point corresponding to this complex number is in the third quadrant
Three. It's all minus after simplification