The Japanese language uses three scripts: kanji, hiragana and katakana. Both kanji (the complicated-looking script which is imported from Chinese) and hiragana

The Japanese language uses three scripts: kanji, hiragana and katakana. Both kanji (the complicated-looking script which is imported from Chinese) and hiragana (the simpler-looking alphabet unique to the Japanese language) are used in all three problems. Katakana — used for (normally English) loan words — appears a few times in the first two problems and look quite simple with mostly sharp, straight lines. I think this exam paper represents how the Japanese language is normally used, with kanji for the main nouns and verbs, hiragana to modify and conjugate, and the occasional loan word in katakana (for tribonacci, rank, vector and Euler-Lagrange) as necessary. I don't think the second problem has particularly more kanji than the other problems.