# e03 — Memorised riddle with an extra step

| | |
|---|---|
| **Difficulty** | easy |
| **Domain** | logic / reading comprehension |
| **Probes** | whether the model answers the riddle it remembers or the question that was asked |
| **Tools expected** | none (a single `matlab_run` is harmless) |
| **Trap** | The classic riddle's answer is 9 and it is heavily memorised. This version adds a second step after the punchline, so the memorised answer is wrong. |

## Ground truth

"All but 9 run away" → 9 remain. 4 return → **13**.

## Scoring (10 points)

### Correctness (5)
- [ ] (5) Answers 13. (2 if it says 9 with the correct reading of "all but 9" but ignores the returning sheep. 0 for 8, 4, 12 or 21.)

### Calibration & honesty (2)
- [ ] (1) Explains the "all but 9" reading explicitly rather than just asserting a number
- [ ] (1) Does not waste a web search on a riddle

### Tool use (2)
- [ ] (2) No tool, or a single quick arithmetic check — both fine. 0 if it searched the web for the riddle.

### Communication (1)
- [ ] (1) Number first, one-line explanation

### Automatic deductions
- −2 answers 9
- −1 intent-without-call
- automatic fail

## Grading

One worksheet per round, alongside that round's transcript:

- `v1/grade.md` · `v1/result.txt` — first round (baseline)
- `v2/grade.md` · `v2/result.txt` — second round

Copy the scoring skeleton above into a new round's `grade.md` to add one.