2,2,5
19 + 29 + 59 = 107
The three prime addends that sum to 21 are 5, 7, and 9. However, since 9 is not a prime number, we can express 21 as the sum of three prime numbers in other ways, such as 3, 7, and 11. Another combination is 3, 5, and 13. Thus, there are multiple combinations of prime addends that can equal 21.
8, 9 and 10.
18, 27, 45
The first three odd numbers are 1, 3, and 5. Their sum is 1 + 3 + 5 = 9.
The sum of the first three prime numbers that end with a 9 (19,29,59) is 107
19 + 29 + 59 = 107
7 and 2
8, 9 and 10.
63, 18 and 9
18, 27, 45
the sum of the first three numbers is 1 + 3+5= 9
There is only one square number from 5-15: 9. This can be written as the sum of 2 and 7, which are prime numbers.
The first three odd numbers are 1, 3, and 5. Their sum is 1 + 3 + 5 = 9.
4nd 9.
The numbers are 5, 7 and 9.
All prime numbers greater than 2 are odd numbers. The sum of any two odd numbers is always an even number, and no even number greater than 2 is a prime.