1, a student * * * answered ten questions and finally got 72 points. He answered several questions correctly.

10-( 10× 10-72)÷( 10+4)

= 10-28÷ 14

= 10-2

=8 questions

2. Student B * * answered twelve questions and finally got 22 points. He answered several questions wrong.

( 10× 12-22)÷( 10+4)

=98÷ 14

=7 questions