\begin{questions}
\begin{multicols}{2}
\item $\begin{aligned}[t]
\numprint{2070} & = 4 \times 432 + 342\\
 432 & = 1 \times 342 + 90\\
 342 & = 3 \times  90 + 72\\
  90 & = 1 \times  72 + 18\\
  72 & = 4 \times  18 + 0.
\end{aligned}$

\Par

Ainsi, $\PGCD(\numprint{2070},432)=18$.

\item $\begin{aligned}[t]
\numprint{1065} & = 4 \times 235 + 125\\
 235 & = 1 \times 125 + 110\\
 125 & = 1 \times 110 + 15\\
 110 & = 7 \times  15 + 5\\
  15 & = 3 \times   5 + 0.
\end{aligned}$

\Par

Ainsi, $\PGCD(\numprint{1065},235)=5$.
\end{multicols}
\end{questions}


\begin{questions}
\setcounter{enumi}{2}
\begin{multicols}{2}
\item $\begin{aligned}[t]
792& = 2 \times 363 + 66\\
 363 &= 5 \times  66 + 33\\
  66 &= 2 \times  33 + 0.
\end{aligned}$

\Par

Ainsi, $\PGCD(792,363)=33$.

\item $\begin{aligned}[t]
910 &= 1 \times 858 + 52\\
 858 &= 16 \times  52 + 26\\
  52 &= 2 \times  26 + 0.
\end{aligned}$

\Par

Ainsi, $\PGCD(910,858)=26$.
\end{multicols}
\end{questions}
