Normal: He was stuck in traffic? I think he was on his way back from the US?
Difficult: 3.
I can imagine why you put down these two answers, but neither is quite correct.
As for Ryoma, that only happened in the anime and furthermore it was at the very beginning of the nationals. Before the national finals he was in Karuizawa, training with Nanjirou (and that's where he lost his memory).
For the difficult question, I assume you answered 3 because there's version A, B and C, but there's the regular version with all nine singing too, so the correct answer would've been 4.
Normal: Kentaro from Rokkaku
Difficult: 37, since it belongs to Yukio Kurobe.
It was actually Shuudo (from Rokkaku). It might've been Aoi in the anime?
37 is correct.
This is correct. The answer to the Normal question would've been Jack Purcell.
Normal: Shizuoka
Difficult: 1. Searching for your own style
2. Choosing your diary
3. Try writing a diary
4. Try to keep making entries regularly
These are correct. Featherwolf gets the points of the Normal question because she answered first.
Normal: Konjiki
Difficult: From when babies cry they go all red
Both of these are correct.
Normal: Satoru Kadowaki, Hanabata Kaito, and Kondou Minoru
Difficult: Niou & Todoroki Goro
The answer to the Difficult question is correct. As for the Normal one, I don't recall Kaito and Minoru actually appearing, but you also missed Hagi.
Difficult: 4:30am
Normal: 5am?
And finally, both of these answers are correct.