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^2 + y^2 = 25 \\
2x + y = 10
\end{array}
\right.
\end{eqnarray}
x+y=?

問題文全文(内容文)：
$\begin{eqnarray}
\left\{
\begin{array}{l}
x^2+y^2-4(a+1)x-2ay+5a^2+
　8a+3=0 \\
x^2=y^2
\end{array}
\right.
\end{eqnarray}$
が4つの解をもつ$a$を求めよ.

問題文全文(内容文)：
大中小3つのさいころを同時に投げる.
さいころの大の出た目を$a$とし,中の出た目を$b$,小の出た目を$c$とする.
$(a-b)(b-c)=0$となる確率を求めよ.

早稲田実業高等部過去問

問題文全文(内容文)：
123456789×9+10

金城学院中学校