RiddleSum vs Mathify

RiddleSum is a clean and addictive number puzzle where your goal is to balance every row and column. Pick the right numbers, remove the wrong ones, and make all sums match the clues on the edges. Simple at first glance - surprisingly deep once you start playing. Every puzzle has one single correct solution. Analyze, eliminate, and find the perfect combination that works in all directions at the same time. It’s a great way to sharpen your logic, focus, and mental math skills. How to play: • Check the target sums for each row and column. • Cross out numbers that can’t be part of the solution. • Keep only the numbers that complete the total. • Solve boards from 3×3 up to 9×9. Features: • Hundreds of handcrafted number puzzles. • Clean and minimal design that feels relaxing. • Helpful hints when you’re stuck. • No timers, no pressure — solve at your own pace. • A subtle daily workout for your brain and arithmetic. If you love smart logic puzzles and satisfying “aha!” moments, RiddleSum is perfect for your daily brain routine. Enjoy solving beautifully simple number challenges anywhere, anytime.

Three kinds of math puzzles, 300 hand-made levels, one goal: train your brain. PIC MATH — 100 LEVELS Animals, food and objects stand for hidden numbers. Use the clues to work out each value, then solve the last equation. The picture puzzles that go viral online, collected from Starter to Grand Master. PATTERN IQ — 100 LEVELS Find the hidden rule in a row of numbers and predict what comes next. Easy, Medium and Hard tiers grow with you. BRAIN SHAPES — 100 LEVELS Puzzles you solve with your eyes: count the squares and triangles in a figure, find the cubes you can't see, fold a net into a cube, add up the hidden faces of dice, find lines of symmetry, work out area and perimeter, balance the scales. WHY YOU'LL KEEP PLAYING • Stuck? A hint gives you a nudge, not the answer • Every level gets a little harder than the last • Jump back to any level you've unlocked • Share a puzzle and challenge your friends • Light and dark themes • Play offline, anywhere • No account, no sign-up: your progress stays on your device Great for students, adults who want daily brain training, and anyone who loves logic puzzles and IQ challenges.