Select all prime numbers from the list: 29, 49, 31, 57.
Note
29 and 31 are primes (no divisors other than 1 and themselves); 49 = 7×7 and 57 = 3×19, so they are composite.
Select all prime numbers from the list: 29, 49, 31, 57.
29 and 31 are primes (no divisors other than 1 and themselves); 49 = 7×7 and 57 = 3×19, so they are composite.