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What prime numbers 21?
A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 21 is composite.
What are the factors and prime numbers of 6?
Prime numbers are 3 and 2. Factors are 1,2,3,6.
Which of the factors of 36 are prime numbers and explain how you know?
2 and 3 are the prime factors of 36. Of the factors of 36, 2 and 3 are the only prime numbers.
Which factors of 20 are prime numbers?
The prime factors of 20 are 2, 2, and 5.
Are 2 3 6 7 14 21 and 42 prime numbers?
Along with 1, those are the factors of 42. 2, 3 and 7 are prime.
What are the prime numbers in 42?
The factors of 42 are 1, 2, 3, 6, 7, 14, 21, 42. The prime factors are 2, 3 and 7.
What does common prime factors mean?
When two or more numbers have one or more of the same primes as factors, those prime factors are called common prime factors. For example, the prime factors of 6 are 2 and 3, and the prime factors of 21 are 3 and 7, so 3 is a common prime factor of 6 and 21.
What are numbers that have 2 factors?
Numbers that have only 2 factors are prime numbers
What is the answer of three numbers have 2 factors in math?
Prime numbers have two factors. 2, 3 and 5 are prime numbers.
What are the factors and prime factors of 18 and 21?
The factors of 18 are: 1, 2, 3, 6, 9, and 18.The prime factors of 18 are: 2 and 3.The factors of 21 are: 1, 3, 7, and 21.The prime factors of 21 are: 3 and 7.
What is the LCM of 28 and 21?
To determine the least common multiple of two numbers, determine the prime factors of both number. Then, determine the prime factors they have in common. Multiply all their prime factors together (in other words, multiply both numbers together) and divide by the prime factors they have in common (in other words, their greatest common factor). The prime factors of 21 are 3 and 7. The prime factors of 28 are 2, 2, and 7. The prime factors in common are a single 7. Therefore, the lowest common multiple is 21 x 28 ÷ 7 = 84
Numbers with only 2 factors are called?
Numbers having only 2 factors are prime numbers. Their only factors are 1 and themselves. Prime numbers. The only two factors should be 1 and itself.
What are numbers with 2 factors?
prime numbers
Why is 21 composite and not prime?
21 has the factors 21,1,7,3. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
What are the primes numbers of 42?
The prime factorization of 42 ia: 2 x 21 2 x 3 x 7. The prime prime factors of 42 are 2, 3, 7.
Why are some numbers prime and some numbers composite?
Prime numbers have only 2 factors while composite numbers have more than 2 factors
Which numbers have exactly two factors?
Prime numbers have exactly two factors.All prime numbers have only 2 factors whereas composite numbers have more than 2 factors
