Non 5 = 5 * 1 = 5 * 5 = 25 = 2 = 2 * 1 = 2 * 5 = 10 = 8 + 2 = 8 * 1 + 2 = 8 * 5 + 2 = 42
Donc 5 = 42

C'est pourtant évident!