Question Number 166448 by SANOGO last updated on 20/Feb/22
$${montrer}\:{q}\:\:\forall{n}\epsilon{N} \\ $$$${n}^{\mathrm{2}} +{n}\:{est}\:{divisible}\:{par}\:\mathrm{30} \\ $$
Commented by MJS_new last updated on 20/Feb/22
$$\mathrm{it}'\mathrm{s}\:\mathrm{not}\:\mathrm{true} \\ $$
Commented by malwan last updated on 20/Feb/22
$${n}^{\mathrm{3}} −{n}\:{est}\:{divisible}\:{par}\:\mathrm{3} \\ $$