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Composite numbers less than 10 include 4, 6, 8 and 9, which add up to 27.
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Is the sum of a prime number and a composite number always even?
No, the sum of a prime number and a composite number is not always even.
Is the sum of any two prime numbers always a composite number?
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.
What is the sum of the smallest prime number and what is the greatest composite number less that ten explain your answer?
2 is the smallest prime number. 9 is the greatest composite number less than 10. The sum of 2 and 9 is 11.
What is the sum of the smallest prime number and the greatest composite number less than 10?
It is: 2+9 = 11
Explain why 7654321 plus 5 is a composite number?
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.
If you add a prime number to itself is the sum prime or composite?
Composite.
If you add a prime number to itself is the sum composite or prime?
Composite.
What is the sum of the composite numbers that are less than 8?
The sum of the composite numbers that are less than 8 is: 4+6 = 10
Is 68 the sum a prime number?
No, it is composite.
Is 693 a prime or composite number?
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.
Is the sum of prime number and a composite number always even?
No.
Which composite number from six to twenty is closest in value to the sum of its prime factors?
The sum of the prime factors of 6 is closest in value to the composite number 6.
