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Dennis_Churaev [7]

4 years ago

13

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

1 answer:

sesenic [268]4 years ago

7 0

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

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