11, 31, 41
1, 11, 21, 31, 41. 1 is not a prime number.
A single digit prime number
The list of prime numbers less than or equal to seven:2, 3, 5, 7
2,3,5,7,11,13,17,19
2, 3, 5, and 7 are prime numbers for one digit numbers. 1 is NOT a prime number.
1, 11, 21, 31, 41. 1 is not a prime number.
A single digit prime number
The ones digit in the product from multiplying the 305 prime numbers less than 2012 is 0 because the ones digit becomes 0 after 2 and 5 have been multiplied and remains unchanged after more prime numbers are multiplied.
The list of prime numbers less than or equal to seven:2, 3, 5, 7
2,3,5,7,11,13,17,19
17
2, 3, 5, and 7 are prime numbers for one digit numbers. 1 is NOT a prime number.
All the prime numbers less than 20 are 2,3,5,7,11,13,17,19
31 and 41.
Search the Internet for a list of prime numbers - the Wikipedia article on prime numbers might list a few. All numbers between 2-100 that are not prime, are composite. (The number is not counted as prime, nor as composite.)
101 103 107 109.
Searching in Google for "list of prime numbers" should help you get a listing. From there you can pick the prime numbers that satisfy your criteria.