Questions and answers from station B QAQ

I only know part of it. .

2 Mathematics

4 One thousand and eight

7 This. . . . . . . . . . . . . 3 people

8 Senjougahara Kuroi

9 8.31

10 Little love!

11 Seventy Thousand

13 Sorachi Hideaki

14 Qinhuangdao

15 Dorayaki

17 Oriental Undefeated

Not necessarily the correct reference