Lagrange's theorem

$\textbf{Lagrange's theorem}$ Let $G$ be a finite group, then the order of every subgroup $H$ of $G$ divides the order of $G$.
$\textbf{Lagrange's theorem}$ Let $G$ be a finite group, then the order of every subgroup $H$ of $G$ divides the order of $G$.
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𝐋𝐚𝐠𝐫𝐚𝐧𝐠𝐞’𝐬 𝐭𝐡𝐞𝐨𝐫𝐞𝐦 Let 𝐺 be a finite group, then the order of every subgroup 𝐻 of 𝐺 divides the order of 𝐺.
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