just like you would dived a normal number only you made need a calculator as it wont go exactly
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You divide the number by 2. If the number is able to divide WITHOUT a remainder, then it is a prime number. If you divide a number by 1, you will get the same number. That is not a prime number.
120 is NOT a prime number because you can divide it by 10 and 5 and 2....
No it is not. A prime number will only divide (to give an integer as a result) by 1 and itself. 267 will also divide by 89 & 3 so it is not prime.
The prime numbers are: 5 and 43
You can divide 31 by any number. But because it is a prime number, the answer will always be a decimal.