1 + 14, 2 + 13, 3 + 12, ...
1.1 + 13.9, 1.2 + 13.8, 1.3 + 13.7, ....
1.01 + 13.99, 1.02 + 13.98, 1.03 + 13.97, ...
And then there are sets of 3 numbers, 4 numbers, and so on.
30
The given numbers of 15 and 35 are not prime numbers but they add up to 50
The two numbers that multiply to -30 and add up to 13 are 15 and -2. When you multiply 15 and -2, you get -30, and when you add them together, you get 13.
15+15+1=31
Impossible.
15
The two numbers that multiply to -15 and add up to 2 are 5 and -3. When you multiply 5 and -3, you get -15, and when you add them together, you get 2.
The numbers are 15, 16 and 17.
You can't make 15 with even numbera
31
23
45