I’ve been searching for the graduate requirements of some university. As regards the language test scores, TOEFL>90 or IELTS>7 are necessary. However, I stumbled upon undergraduate requirements: TOEFL>100 (>25 each) or IELTS>7.5.
In my opinion, graduate studies are more complex thus require higher levels/skills, so what could be reasons that the graduate scores are lower than the undergraduate ones?