From open sources
53Showing everything, including problems with no answer to check, a missing figure, or a near-copy elsewhere. Show only complete problems
| # | Title | Difficulty | |
|---|---|---|---|
| 133469 | Does … lead to | Deep | |
| 133470 | The mountain … has an area … above the … axis | Deep | |
| 133499 | Suppose … is concave up | Deep |
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