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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 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.
Is the prime number 21 is a prime number?
21 is a composite number, not a prime, having prime factors 3x7.
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.
