From open sources
4Complete problems only, with worked solutions first. Show everything
| # | Title | Difficulty | Source | |
|---|---|---|---|---|
| 11121 | A printing press is printing brochures | Deep | GSM8K | |
| 106610 | Counting Principles · Exercise 44 | Deep | OpenStax | |
| 106608 | Counting Principles · Exercise 42 | Deep | OpenStax | |
| 106612 | Counting Principles · Exercise 46 | Deep | OpenStax |