trick question
A question designed to mislead or catch someone out, often used in tests or quizzes.
That test had a lot of trick questions.
The verb meaning 'to hook' or 'to trap'; ひっかけ問題 derives from the idea of 'hooking' someone with a misleading question.
Common kana-mixed spelling; the verb 引っ掛ける is often written in kana in this compound.
Kanji spelling using 引っ掛ける; less common but still seen.
Compound of 引っ掛け (continuative form of 引っ掛ける, 'to hook, trap') + 問題 ('question, problem').