There are infinitely many possible sets.For example, using 2 numbers,
25 + 25, 24 + 26, 23 + 27, ... 1 + 49, 0 + 50, -1 + 51, -2 + 52, ....
Then you can look at numbers with 1 digit after the decimal point:
24.9 + 25.1, 24.8 + 25.2, and so on
Next you can look at numbers with 3 digits, 4 digits, ... , infinitely many digits after the decimal point.
Then move to triplets of numbers, sets of 4 numbers, 5, 6, ... infinitely many numbers.
rearrange 1 to 50 so that you see this pattern: 50 = 50 1+49 = 50 2+48 = 50 ... 24+26 = 50 25 = 25 then add this up: 25 x 50 + 25 = 1275
24 and 25 - add 1 to 49, gives 50. Half it, gives you 25. 2 x 25 = 50, take 1 away from one of the 25's = 24 and 25 = 49.
Do-it-in-your-head method: 74 minus 24 is 50, half of 50 is 25 and that is your smaller number so your other number is 25 add 24 ie 49.
1, 50, 10, 25, 24
50 add 25=50+25 so the answer is 75
16/50, 24/75
24. 25 if you include 50.
-27
14, 24, 25, and above 50
51
25 if you count 1, 24 if you don't.
-49