How to Play
- Read the attempts
Each row is a code that failed, and how it scored.
- Count the marks
Filled means right digit and right slot. Hollow means right digit, wrong slot.
- Open the lock
Work out the code, tap it in, move to the next lock.
Every lock has one code and a few failed attempts pinned beside it. Each attempt tells you how close it came. That is enough β no guessing required.

Failed attempts, each marked for how close it was. Three tries per run, and every lock has exactly one answer.
Filled dot: right digit, right slot. Hollow dot: right digit, wrong slot.
Each row is a code that failed, and how it scored.
Filled means right digit and right slot. Hollow means right digit, wrong slot.
Work out the code, tap it in, move to the next lock.
Reach one answer from a handful of facts.
Hold several constraints in mind while you test a candidate.
Rule possibilities out instead of guessing at them.
Neuriosity quizzes are designed for fun and personal insight, not as medical or diagnostic assessments.