The three composite numbers are 28, 30 and 32. Their sum is 90.
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.
The sum of two prime numbers will be composite unless one of the prime numbers is 2.
No, they are not. You can add two composite numbers, 15 and 14 for example, and get a sum, 29, that is prime.
Not always, for example 2 + 3 = 5 where 5 is also a prime number.
The three composite numbers are 28, 30 and 32. Their sum is 90.
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
The sum of two prime numbers will be composite unless one of the prime numbers is 2.
No, they are not. You can add two composite numbers, 15 and 14 for example, and get a sum, 29, that is prime.
Not always, for example 2 + 3 = 5 where 5 is also a prime number.
4nd 9.
65 and 77
21 and 32
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The smallest two-digit composite number is 10, which is the product of 2 and 5. The largest two-digit composite number is 99, which is the product of 3 and 33. To find the sum of the smallest and largest two-digit composite numbers, we add 10 and 99, resulting in 109.
Since 4 and 28 are composite numbers, then any of their multiples are also composite.