PurrLearn Daily — one reasoning question a day

A single question a day - the kind that actually shows up in aptitude tests and interviews - with the full worked explanation once you answer. 90 questions drawn from PurrLearn's practice sets: - Logic puzzles (knights and knaves, river crossings, weighings) - Abstract and spatial reasoning - CCAT-style questions and what a good score actually means - Interview questions: behavioural, Python, JavaScript, SQL, system design - Excel that fails silently: SUMIF, INDEX/MATCH, DATEDIF, Power Query Every question explains why the attractive wrong answer is wrong, not just which option is right. Bilingual: switch between English and Chinese with one click. No account. No network requests. No tracking of any kind - the extension ships with its questions built in and never talks to a server. Your streak is stored only in your own browser.