Lets say im training in Sp.Atk. i fed my pokemon the medicine that raises EVs. i let it hold Macho Brace. How many times would i have to battle a pokemon that gives off 3 Sp.atk EVs to get 252 Evs? Is that the same for Speed also?
Assuming you gave your Pokemon 10 of the medicines, you would need 152/6=25.33333.... or 26 Pokemon. Same for Speed.