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Q: What three prime numbers add up to another prime number?

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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.

A prime number times a prime number is a composite number. Since prime numbers, except for 2, are odd numbers, a prime number times a prime number is usually an odd number. It will only be an even number if one of the prime numbers is 2. A prime number times a prime number will be a number with four factors unless both prime numbers are the same, in which case it will be a square number with only three factors.

the answer is 120 because the first three prime numbers are 2,3,5 and the first three composite numbers are 4,6,8.

The only prime number divisible by three is three itself.

Three.Three.Three.Three.

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if you mean what three prime numbers add up to a prime number then the answer is : 5 + 7 + 11 = 23

3, 5, and 7 are three prime numbers whose average is 5.

7

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.

3, 5, and 7 are three prime numbers whose average is 5.

181 is a prime number. Prime numbers can't be multiples of three.

2 and 3 2 and 5 2 and 11

No 5291 is not a prime using 2 numbers. It is a prime using three numbers.

There are three primary colours and three is a prime number. The answer above me is great ^_^ but dont forget... They're both the most important colors/numbers. Kind of. =P

The premise of your questions is false: NOT every number is a prime number.

30 has three prime numbers and is a factor of 60.

None. 251 is a prime number.

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