Problems.cc

Problems is a daily dose of beautiful maths puzzles from Exact Science.

Every day you get a new set of bite-size challenges designed to sharpen real mathematical thinking — not just pattern-matching. Solve them in a couple of minutes, build a streak, and come back tomorrow for more.

THREE DAILY GAMES • Cryptarithm — each letter stands for a different digit; crack the code so the sum is correct. • Magic Square — fill the grid so every row, column and diagonal add up to the same total. • Summit — slot operations between the numbers to hit the target.

WHY YOU'LL LIKE IT • A new puzzle every day, with a full archive of past days to play. • Streaks and progress tracking to keep the habit going. • Clean, calm design with a light and dark theme. • No ads. No pre-game interruptions. No sign-up required to play. • Optional free account to sync your progress across devices.

Built by Exact Science, the team behind problems.cc, drawing on a problem-solving tradition that values depth, structure and clear reasoning.

Play today's puzzles, keep your streak alive, and make maths a daily habit.