Probability paths
A route opens only when every component on it works. Compare the two layouts or upgrades.
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Shared components · Compare separate routes with shared bottlenecks and connected stages.
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6 questions · No time limit
Example
Example
Example · Standard
Which layout has the greater chance of an open route from start to finish?
Every numbered component works independently. Its fraction is its chance of working. Plain lines always work. Any complete route connects start to finish.
- Questions answered
- 0 / 6
- Active time
- 0:00
Ready to start?
Use the component chances to decide which option has the greater chance of an open route.
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Reload pageOptional and off by default. Share starts, completions, replays and error categories. For visits from ChatGPT, starts and completions can also include the first QuickenBrain page and broad country. No answers, drawings or names.
How this data is usedHelp
Each numbered component independently works or fails, with the working chance shown. Plain connecting lines always work. A route needs all its components; several routes may share the same component. Compare the chance of at least one complete route. The review counts every working and failed state exactly. These are original reasoning questions, not a validated intelligence assessment.
Each round has six questions and no time limit. Choosing an answer locks it. Review the steps, then move to the next question. Finish all six to save the round. Active time includes reviewing the steps, but does not count time when this page is hidden. Speed does not affect your score.
Use Tab and Enter or Space to choose an answer. The number keys also select answers, except when another control is focused. After an answer, Enter goes to the next question.
Original practice puzzles, not a standardized assessment.
About this practice
Learn a method
Notice the shared gateA route opens only when every component on it works. Compare the two layouts or upgrades.
Report a problem
Optional and off by default. Share starts, completions, replays and error categories. For visits from ChatGPT, starts and completions can also include the first QuickenBrain page and broad country. No answers, drawings or names.
How this data is used