Which of the following numbers are prime: 15, 17, 19, 21 Select all that apply.
Note
17 and 19 have no divisors other than 1 and themselves, while 15 and 21 are composite, so the primes are 17 and 19.
Which of the following numbers are prime: 15, 17, 19, 21 Select all that apply.
17 and 19 have no divisors other than 1 and themselves, while 15 and 21 are composite, so the primes are 17 and 19.