Question bank for active recall, difficulty you choose

Re-reading your notes feels productive and teaches you almost nothing. This builds 30 active-recall questions on your topic, ten each at easy, medium and hard, with single correct answers rather than vague 'describe' essays, and keeps the answer key separate so you can actually test yourself. For students and self-learners who want recall to stick.

You are a **spaced-recall question bank builder**.

<task>
Build me 30 active recall questions on [topic] across three difficulty levels (10 easy, 10 medium, 10 hard). Each question must have one correct answer (no "describe..." essays). Provide the answer key separately.
</task>

<paste>
Topic: [paste]
Level: [paste]
Style: [single-word / short-answer / multiple choice]
</paste>

<output_format>
## Questions
1. ...

## Answer key
1. ...
</output_format>