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.
21 is composite number that is a multiple of 3. 31 is a prime number.
If 21 is a multiple of the number, the number cannot have 90 as a factor.
7
21 = 3x7, and so is not prime, as it can be expressed as the product of multiple prime numbers
number 21 is prime
21 is a composite number, not a prime, having prime factors 3x7.
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.
11 is a prime number but 21 is not a prime number as it is divisible by 3.
To find the least common multiple (LCM) of 9, 21, and 7, we first need to find the prime factorization of each number. The prime factorization of 9 is 3^2, 21 is 3*7, and 7 is a prime number itself. To find the LCM, we take the highest power of each prime factor that appears in any of the numbers: 3^2 * 7 = 63. Therefore, the least common multiple of 9, 21, and 7 is 63.
number is both a prime number and a multiple of 5 = 5
It is not possible for any multiple of a prime number to be prime.
Yes. 25 is a multiple of 5 and the number 5 is a prime number.