問題文全文(内容文)：
△AMD=9のとき
△MEC=?
＊図は動画内参照

智弁学園高等学校

問題文全文(内容文)：
Let's enjoy oriental mathematics for just a little while.
You will discover a cute world from mathematics.
Everyone in the world should love and be good at mathematics.

We are introducing the entrance exam questions for Japanese high schools.
It's an important issue for you to understand the basics of mathematics.
Would you like to solve this math problem and check out our commentary?

問題文全文(内容文)：
$
\begin{eqnarray}
\left\{
\begin{array}{l}
x + y = m \\
xy = n \\
x>y\\
m,nは素数
\end{array}
\right.
\end{eqnarray}
$
自然数x,y,m,nを求めよ

早稲田大学高等学院

問題文全文(内容文)：
3桁の奇数で各桁の数の積が252となるものをすべて求めよ.

ラ・サール高校過去問

問題文全文(内容文)：
$
\left\{
\begin{array}{l}
19x + 21y = 44 \\
21x + 19y = 36
\end{array}
\right.
$