No, the sum of a prime number and a composite number is not always even.
The sum of any two prime numbers is not always a composite number. The sum of 2 and 11 is 13, and 13 is a prime number, not a composite number.
Composite numbers less than 10 are 4, 6, 8 and 9. So, the sum is 4 + 6 + 8 + 9 = 27.
No, it is composite.
It is: 2+9 = 11
The sum of the composite numbers that are less than 8 is: 4+6 = 10
2 is the smallest prime number. 9 is the greatest composite number less than 10. The sum of 2 and 9 is 11.
The first number is odd, the second is odd. Odd + Odd = Even ie the sum is even. Either number is greater than 2 so their sum is greater than 2. All even numbers greater than 2 are composite.
The sum of the prime factors of 6 is closest in value to the composite number 6.
693 can be divided by 3 ==> composite number. This is an easy prime because if you make a sum of all the digits: 6 + 9 + 3 = 18, if you can devide this sum by 3 than you can also divide the original number by 3.
The number 993 is a composite number because you can divide it by 3. A good strategy for figuring this out on your own is adding up all the digits. If you can divide the sum of the digits by any numbers besides 1 and that number than that number will be a composite number. You can do it, just remember this!
The sum of two prime numbers will be composite unless one of the prime numbers is 2.
471 can be divided by 3 ==> composite number. This is an easy prime because if you make a sum of all the digits: 4 + 7 + 1 = 12, if you can devide this sum by 3 than you can also divide the original number by 3, else you can't devide this number by 3.
Yes.The sum of any six prime numbers, excluding 2, will be even. So the sum will be composite.
Not always as for example 20+9 = 29 which is a prime number
What is the sum of the composite numbers less than 10?4 + 6 + 8 + 9 = 27
ok so this is a little hard umm... the 10th prime number is let's see: 1,2,3,5,7,11,13,17,19,23 <------ 23 And the 10th composite number is: 4,6,8,9,10,12,14,15,16,18<------- 18 SO 23 plus 18 ISSSSSS........... 41 So the sum of the 10th prime number and the 10th composite number is 41!!! * * * * * 1 is neither prime nor composite. So the tenth prime is actually 29 and the sum is 47.