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6. The greatest common factor of 30 and 45 is () and their least common multiple is ()
The greatest common factor is 3 and the least common multiple is 90
The greatest common divisor and the least common multiple of 6 and 27
Please give me a graph with short division
Examples 6 and 27
Because 6 = 3 * 2 27 = 3 * 3 * 3
Since the two number factors have the common factor 3 after decomposition, their greatest common divisor is 3,
Since the factorization of two numbers has the same 3, the greatest common multiple is
3 * 2 * 3 * 3 = 54
The greatest common divisor and the least common multiple of the ball?
I want formula. Who can help me to list. Basic junior high school below all forget. Please seriously answer, don't mislead
12=2×2×3
27=3×3×3
So the greatest common divisor is [3]
The least common multiple is 2 × 2 × 3 × 3 = [108]
If any two prime numbers multiply, must the product be prime or even or composite?
Total number
The product of two prime numbers greater than 2 must be a prime number B even number C combined number
C
Idea: because the composite number can be written as the continuous product of prime factors
The product of two prime numbers greater than 2 must be (). (1): prime number (2): even number (3): odd number
The product of two prime numbers greater than 2 must be ((3): odd)
Can all even numbers greater than 2 be expressed as the sum of two prime numbers?
Not 2 + 2 = 4
Two prime numbers are sure to be prime, and the two prime numbers are sure to be prime______ ．
The common factor of two different prime numbers is only 1, so two different prime numbers must be coprime numbers, which is correct. But two composite numbers may also be coprime numbers, for example, 8 and 9, 4 and 9 are composite numbers, but they only have a common factor of 1, so they are coprime numbers. Therefore, two prime numbers must be coprime, and two coprime numbers must be prime numbers
Two prime numbers are sure to be prime, and the two prime numbers are sure to be prime______ ．
The common factor of two different prime numbers is only 1, so two different prime numbers must be coprime numbers, which is correct. But two composite numbers may also be coprime numbers, for example, 8 and 9, 4 and 9 are composite numbers, but they only have a common factor of 1, so they are coprime numbers. Therefore, two prime numbers must be coprime, and two coprime numbers must be prime numbers
Are both coprime numbers prime
1. It is not necessary that two coprime numbers are prime numbers. As long as the common factor of two numbers is only 1, they are coprime numbers
2. There are three kinds of Coprime numbers
First, both numbers are prime numbers
The second is a prime number and a composite number
Third: both are composite numbers. (for example, 14 and 15 are also coprime numbers)
RELATED INFORMATIONS
- 1. What are the greatest common divisor and the least common multiple of 12 and 14? Is it the same as the greatest common divisor of 200 and 350?
- 2. The least common multiple of 5 and 12 minus______ Is equal to their greatest common divisor. The least common multiple of 91 and 13 is their greatest common divisor______ Times
- 3. There are two natural numbers. Their greatest common divisor is 21 and their least common multiple is 462. What is the difference between the two natural numbers? This problem requires decomposition of the prime factor solution. Thank you!
- 4. If the least common multiple of natural numbers a and B is 140 and the greatest common divisor is 5, then the maximum value of a + B is 140______ ．
- 5. A △ B = 3 (both a and B are natural numbers), the greatest common factor of a and B is (), and the least common multiple is ()
- 6. If Ba = C (a, B, C are all natural numbers not equal to 0), the greatest common factor of a and B is______ The least common multiple is______ ．
- 7. The greatest common divisor of the two numbers is 18, the least common multiple is 180, and the difference between the two numbers is 54______ And______ ．
- 8. The greatest common divisor of the two numbers is 18, the least common multiple is 180, and the difference between the two numbers is 54______ And______ ．
- 9. The greatest common factor of a and B is 12, and the least common multiple is 252!
- 10. The greatest common factor is 12, and the least common multiple is 252. Given that the number a is 36, find the number B
- 11. Which eight ratios can four numbers be selected from the divisors of 16?
- 12. Choose four numbers from the divisors of 24 to make up the proportion
- 13. What are the divisors of 36? Find four numbers to form a proportion ()
- 14. The divisor of 16 is______ Among these divisors, four divisors are selected to form at least two proportions______ ．
- 15. The minimum multiple of a number is 36, and the divisor of the number is
- 16. The difference between the least common multiple and the greatest common multiple of a and B is 20, which is equal to the sum of the two numbers
- 17. The two numbers a and B only contain 2 and 3 prime factors. The number a has 21 divisors and the number B has 10 divisors. Their greatest common divisor is 18. How many are these two numbers
- 18. If the least common multiple of two integers is 140, the greatest common divisor is 4, and the decimal cannot divide the large number, then the two integers If the least common multiple of two integers is 140, the greatest common divisor is 4, and the decimal cannot divide the large number, then the two integers are ()
- 19. Which are prime numbers, which are composite numbers, which are even numbers and which are odd numbers in 49,51,12,37,1,0.5,85
- 20. Using the smallest prime number, the smallest odd number and the smallest composite number in the natural number to form a minimum three digit number is______ ．