RiddleSum vs CoinSum

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.

Get ready for a fast-paced number challenge with CoinSum! A falling coin holds a target number, and your goal is to find the two numbers at the bottom that sum up to it. Think fast and tap faster before the coin hits the bottom! The clock is ticking (or rather, the coin is falling!), and the faster you solve the sum, the more points you'll earn. As you score more, you'll level up, and the coin will fall even faster. Can you keep up with the increasing speed and challenge your brain? CoinSum is easy to learn but hard to master. With two difficulty modes, Easy and Hard, it's perfect for both quick casual sessions and intense challenges.