Which of the following is a prime number 67,65,63 or 60

Use the rule of divisibility:

60 is composite because it is even so it can be divided by 2

67 is prime because none if the divisiblility rules work on it

65 is composite because it has a 5 by the end which means it can be divided by 5

63 is composite because the sum of the digits equal to 9 which can be divided by 3 and 9