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When all of them are prime numbers,then just multiply the numbers to get the LCM of those 3 numbers.

Q: How do you find the lcm of three numbers when all of them are prime?

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Yes but the on prime numbers are 2,3

No.

30, 42, 66, 78

30, 42, 66, 78

Nobody. That is because there is no pattern to prime numbers. There are various methods to find some classes of prime numbers but none that will find all of them.

Related questions

These numbers are ALL prime.

The given three numbers are all prime numbers

Yes but the on prime numbers are 2,3

non-prime no.

The question, "the" three odd prime numbers, is wrong. There are much more than three odd prime numbers - in fact, infinitely many. There are infinitely many prime numbers, and all except the number 2 are odd.

By factoring them. Prime numbers have only two factors. Composite numbers have three or more.

No.

No.

There are not three prime numbers that have the sum of 3. The smallest prime number is 2. If all three prime numbers were 2, the sum would 2 + 2 + 2 = 6, so that is the smallest number that is the sum of three prime numbers.

30, 42, 66, 78

30, 42, 66, 78

Nobody. That is because there is no pattern to prime numbers. There are various methods to find some classes of prime numbers but none that will find all of them.