How does the daily challenge change?
BrainOtter generates five number, arithmetic, and logic puzzles from your device’s local date. The same date gives the same set. Start a new round after midnight for the new day’s puzzles. An in-progress round belongs to the date it started.
Hints are part of playing
Each puzzle starts at 20 points. A wrong answer or using a hint subtracts 5, with a minimum of 5 points once solved. There is no time limit. A wrong option cannot be selected twice, and a correct answer reveals an explanation.
Your progress lives in this browser
Each completed round earns 20 XP. The daily challenge counts toward XP and your streak once per date. Practice rounds earn XP each time you finish. Your streak counts consecutive dates with a completed daily challenge. Clearing browser data or changing devices will not carry your progress over.
Missing a day is just missing a day
After a skipped day, the next daily completion starts a new one-day streak. Total XP and best scores remain. These puzzles are for enjoyment; they do not assess intelligence or health.
Original game guides and worked math examples by BrainOtter. No health or cognitive improvement claims are made.