No, they are three numbers, not one. 21 is composite.
19 is prime number. 10, 21 and 62 are composite numbers.
21 is composite as 3 times 7 is 21 31 is prime
Out of those 100 numbers, 21 of them are prime numbers, so the remaining (100 - 21) = 79 are composite.
composite numbers between 11 and 21:12 14 15 16 18
The composite numbers between 21 and 31 are: 21 22 24 25 26 27 28 30
The factors of 21 are 1, 3, 7, and 21. The only factor of 21 that is a composite number is 21.
No.
21 and 22 are consecutive composite numbers.
Of those, 5 is not composite.
21 is a composite number. 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.
7 and 3 are prime numbers but 21 is a composite nuber