Zero? vs RiddleSum

Can you tell if the sum of 3 numbers are a multiple of ten? 4 numbers? More? It sounds easy, but hurry... time is running out! Challenge your friends, and play face-to-face on a single iPad or iPhone! Fun for all ages, choose your favourite mode: • Zoom & Zen, for a fast or easy-paced challenge • Relax, for stress-free fun without the time pressure • Two-player, the unique way to play with your friends in head-to-head action! Reviews for Sum Fun: “ It’s a solid math game, one that brings in interesting gameplay ideas and which has a stellar execution ” – AppGames.net: 9 / 10 “ By the time your kids have played with this app a few times, they’ll be adding up the numbers faster than you can say, ‘What’s six plus eight?’ ” – Fun2Tap: 5 / 5

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.