Si 2 = 6     3 = 12      4 = 20      5 = 30      6 = 42 Puis 9 = ? ?

puisque
6/2=3
12/3=4
20/4=5
30/5=6
42/6=7
x/9=?
9*8=72
DONC X=72
we ana ely halelha :D

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