I have another approach.
The numbers 1,5,9,11,21,25 are all odd. Odd + Odd is Even and Odd + Even is Odd. Adding three odd numbers is an odd sum.
Fifty is even so any subset of three numbers from that list can never be even or 50.
You are viewing a single comment's thread from:
This actually mod 2 number theory. We call even numbers 0 and odd numbers one. Thats why 1+1+1 is 1 (mod 2)
Posted via D.Buzz