関連ワード:  is class 10 science hard    is grade 10 science hard    is class 10 social science hard    is class 10 science paper hard    is grade 10 life science hard    is class 10 science easy or hard    is grade 10 computer science hard    is class 10 science paper tough 2025    is class 10 science paper tough 2024    is class 10 science exam tough