Prime numbers: 1, 2, 3.
Not prime numbers: 4, 6, 9. 12, 18, 36
Eighteen and thirty-two have two prime factors in common, 1 and 2.
No. Prime numbers are numbers that can only be divided evenly by themselves or one. 90 can be divided by ten, five, nine, two, forty-five, eighteen, three, thirty, six, and fifteen.
No 37 is a prime number
13, 3, and 2
5+13
23, 29
2,3,5,7,11,13, 17,19,23,29,31,37
1,3,4
All of these numbers are prime numbers that are less than thirty: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29
17 and 13
one and thirty-one. It is a prime number.
Twelve: 2,3,5,7,11,13,17,19,23,29,31,37.