3.1
2, 3, and 13 are all prime numbers and their sum is equal to 18.
13
The sum of 18 and 15 is 33. 10+10=20 & 8+5=13. 20+13=33.
93
-18
1 + 17 = 18 5 + 13 = 18 7 + 11 = 18
13 and 5 11 and 7
13 and 5
13 and 5 13+5=18 13x5=65
31 and 18
The two numbers are 13 and 18
There are two pairs of prime numbers that express 18 as the sum of two prime numbers: 7 + 11 = 18 and 5 + 13 = 18.