To find the answer to the following math problem, you need the process factors and multiples .

1.First of all, the three-digit number should be divisible, then it should be an integer multiple of the least common multiple of 70, and if it is a three-digit number, the smallest should be 140, then 210, 280, 350, 420, 490, 560, 630, 700, 770, 840, 910, and the largest is 980That's 560 in the middle

2. This basically depends on the ability to dismantle, which should be 9 and 10

I'm sorry, I've been thinking about it for a long time, but I still won't, hehe! Can't help you!!

The least common multiple of 560, 2, 5, and 7 is 70, and the three-digit number must be a multiple of 70, and the multiplier from 2 to 14 times 70 is a three-digit number.

Decomposing 90 reveals that it is 2*3*3*5, and they form two composite numbers and are coprime, so they are 9,10

Decomposing 90 finds that it is 2*3*3*5, and bringing 2*3 out leaves 3*5, because the greatest common divisor is 6, the least common multiple is 90, one is 18, one is 30, and the addition is 48

uyyuuyyu2010's is already pretty good, but there is an answer 96 for question 3, a number is 6, and the other is 90. The fifth question is wrong, you will find that the correct answer should be 280.

Hehe, it's not difficult to set up unknowns.

The factor of 75 is definitely not greater than 75, and the multiple of 5 is not more than 75, which is the factor of 75 is only 5, bending, and lead spring 75

If a number is both 48 and a factor is a multiple of 12, this number may be 48. Because 48 is the largest in 12 and 48, the 12 in 12 also has a multiple of 48, so the smallest is 48

Factor of 48 ;

Multiples of 12 .

A number is both a factor of 48 and a multiple of 12, and this number may be

The factor of 48 has .

The number which is a multiple of 12 is .

Answer: A number is both a factor of 48 and a multiple of 12. This number could be ).

A number is both a factor of 48 and a multiple of 12, and this number may be

48=2x2x2x2x3

The factor of 48 has .

There is a multiple of 12 smaller than 48

where is divisible by 48.

So that number could be 24

Because if it's all right, it's 10 7 = 70 points.

If you don't answer 1 question, you will lose 7-1 = 6 points, and if you answer incorrectly, you will be deducted 7+3=10 points.

And here it's all even.

Therefore, the difference between 70 and several 6s or 10s must be even.

The most difficult true/false questions about factor multiples.

1. Odd numbers are prime numbers, and even numbers are composite numbers.

2. The sum of two consecutive natural numbers must be odd.

3. Because 18*4=72, 72 is a multiple and 4 is a factor.

Yes 2 times, so 5 is 2...Multiples of 5.

5. The common factor of two odd numbers is only 1.

6. The greatest common factor of two numbers is a multiple of their common factor.

7. If n is used to represent a natural number, then 2n must be an even number.

8. Even numbers are not necessarily composite.

9. The larger a number, the more its factors; The smaller a number, the fewer its factors.

10. If the mantissa is 2, the number must be a multiple of 2.

11. The product of prime numbers and composite numbers is still prime numbers.

12. The sum of prime numbers and composite numbers must be prime numbers.

13. The side length of a square is any natural number, and its area must be a composite number.

14. There is only the smallest odd number, and there is no largest odd number, which is the factor of all natural numbers.

16. A natural number is either odd or even.

17. All odd numbers are prime numbers, and all even numbers are composite numbers.

Multiples of 4 within 4 are 4, 8, 12, 16, 20

19. The multiple of a number must be greater than itself.

20 The smallest multiple of a number (except zero) divided by its least factor quotient is 1

21. Numbers that are 1, 3, 5, 7, and 9 in the single digit are odd numbers.

22. Both numbers that are coprime are prime numbers.

23. As long as a natural number contains the factor 2, it must be a multiple of 2.

With any odd number and must be a multiple of 2.

25. Three consecutive natural numbers, at least one of which is a composite number.

26. Even numbers greater than 2 are composite numbers.

27. There is no common factor between two prime numbers.

28. The number that is coprime with any natural number is only 1

29. All prime numbers except 2 are odd.

30. There are at least 2 factors of a number.

31. The largest factor and the smallest multiple of a number are equal.

32. A number is a multiple of 2, and this number must be a composite number.

33. The greatest common factor for all even numbers is 2

34. The number A is 7 times that of the number B, and the greatest common factor of the two numbers A and B is the number A.

2 * 2 = 4 trees, the number of teachers and students is: 37-1 = 36 people, 36 is a multiple of 3, so the whole class of students: 36 people, each person planted trees, the fifth grade class of students can just stand in a three-way heavy team, indicating that the number of fifth grade students is 3 times, so 73 people are unreasonable, the number of students is the landlord hello.

If each person plants 2 trees, the number of teachers and students is the same.

Mr. Wang planted the same number of trees as each student, so the number of teachers and students must be about 148: 37.

Factors you know if you can divide 2, 3, 5 and then you can start to divide these numbers (short division), and then multiply the two numbers with the factors contained in them to be the greatest common factor.

Multiples choose to multiply the two numbers first.

An integer can be divided by another integer, and that integer is a multiple of another integer. For example, 15 is divisible by 3 or 5, so 15 is a multiple of 3 and a multiple of 5.

The quotient obtained by dividing one number by another. For example, a b = c, that is, a is a multiple of b. For example, if a b=c, it can be said that a is c times that of b.

There are infinite multiples of a number, which means that the set of multiples of a number is an infinite set.

Note: You can't call a number a multiple alone, you can only say who's the multiple.

Extended information: If the single digit of an integer is truncated, and then subtracted from the remaining number by 2 times the single digit, if the difference is a multiple of 7, the original number is divisible by 7. If the difference is too large or it is not easy to see whether it is a multiple of 7, the above process of truncating, multiplying, subtracting, and checking the difference will be carried out until it can be clearly determined.

For example, the process of determining whether 133 is a multiple of 7 is as follows: 13-3 2=7, so 133 is a multiple of 7; Another example is the process of determining whether 6139 is a multiple of 7 as follows: 613-9 2=595, 59-5 2=49, so 6139 is a multiple of 7, and so on.

If the difference between the sum of the odd digits and the sum of the even digits of an integer is divisible by 11, then the number is divisible by 11. Such as and and 95949392 are divisible by 11.

The multiple test method of 11 can also be treated with the tail cutting method of the above inspection 7. The only difference in the process is that the multiplier is not 2 but 1.

If the sum of all separated numbers is a multiple of 11, then this number is a multiple of 11 (such as 32571, separated into 3 25 71, 3+25+71=99, 99 is a multiple of 11, so 32571 is a multiple of 11).

Multiple choice questions.

and 4 can be 8 (a).

a。Exhaust b. Divisible.

2.The minimum multiple of the number A is exactly equal to the maximum factor of the number B, and the number A and the number B are compared (b).

a。A number B number b. Number A = Number B C. Number A Number B Number D. Not sure.

3.If a b = 30, then ( b ).

It must be a multiple of b, it could be a multiple of b.

Then (a).

Yes 8 times Yes is a multiple.

Who am I. 1.I am a factor of 27 and a multiple of 3. I am ).

2.I am a factor of 54, which is a multiple of 9, and my factor is 2 and 3 I am (18).

3.I am a multiple of 7 within 50, and one of my factors is 4 and I am (28).

4.I am a factor of 30 and a multiple of 2 and 5 I am ).

Fill a vacancy. 1.The smallest multiple of a number minus its greatest factor, the difference is (0).

2.The smallest multiple of a number divided by its greatest factor, the quotient is (1).

3.A natural number is smaller than 20, it is both a multiple of 2 and a factor of 7, and this natural number is (14).

4.If the greatest factor of a is 17 and the smallest multiple of b is 1, then there are (6) all factors of the sum of a + b, (5) of the difference between a and b, and (2) of the product of a b.