Observed arrival · 2026-09-07

Wrongbook: Every Wrong Answer, Explained

wrongbook.ink Observed source

Editorial interest 86/100 Selection signal · not a rating of the site

A free, student-built CSCA admission-exam practice platform that diagnoses the misconception behind each wrong answer.

Landing page captured for the 2026-09-07 issue.

Field notes

Wrongbook organizes practice around the cause of an incorrect answer, not only the correctness of the final choice. Its stated bank covers 320 mathematics and 560 physics questions, with 493 named misconceptions attached to distractors. The site says 744 items have had their keys and wrong options re-derived by a symbolic-math engine, while 136 older items remain under review. Review sessions use fresh variants and a three-question retirement rule.

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◎NicheUnusually specific use

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