In a magic triangle, each of the six whole numbers 10; 11; 12; 13; 14; 15 is placed in one of the circles so that the sum, S, of the three numbers on each side of the triangle is the same. The largest possible value for S is ....
Ai bk thì giải giùm mik nha :) ( tiểu học ko bk thì đừng giải bậy nhak :) thanks