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No, it is not possible. Every multiple of 21 is a composite number.
21 is a composite number and its factors are 1, 3, 7 and 21(4 factors). Any multiple of 21 must have all the factors of 21. So, every multiple of 21 has at least 4 factors.
And a Prime number has only two factors so, any multiple of 21 can't be prime.
What else can I help you with?
Is 21 and 31 a prime number?
21 is composite number that is a multiple of 3. 31 is a prime number.
What number is it has 90 as a factor thre number is prime 21 is the multiple of the number?
If 21 is a multiple of the number, the number cannot have 90 as a factor.
What number is a factor of 70 is a prime number and 21 is a multiple?
7
Is 21 prime or not prime?
21 = 3x7, and so is not prime, as it can be expressed as the product of multiple prime numbers
Is number 21 prime or composite?
number 21 is prime
Is the prime number 21 is a prime number?
21 is a composite number, not a prime, having prime factors 3x7.
Is 2008 a prime number?
No, you can easily see that this is an even number, so it is a multiple of 2.2 IS A PRIME NUMBER!!Any number that is a multiple of a prime number is NOT a prime.
What number is both a prime number and a multiple of 5?
number is both a prime number and a multiple of 5 = 5
Is it possible for a multiple of 13 greater then 13 to be a prime number?
It is not possible for any multiple of a prime number to be prime.
Is 25 a multiple of a prime number?
Yes. 25 is a multiple of 5 and the number 5 is a prime number.
Are 21 and 11 prime numbers?
11 is a prime number but 21 is not a prime number as it is divisible by 3.
Can a multiple of a prime number be prime?
No. Let p1 be a prime number. Let p2 be a multiple of p1 such that p2 = p1 * k. Then the factors of p2 are: 1, p1, k and p2. ==> p2 is not a prime number. Hence, a multiple of a prime number cannot be a prime number.
