Five vs Missing Digits

A new challenge for puzzle lovers – from the creator of the numerical board game hit Five-O! If you've played Five-O, you'll find the rules to be simple and familiar. Just arrange the tiles onto the blank spaces in the puzzle so that every sequence adds up to a multiple of five (5, 10, 15, etc.). The puzzles start out with a set of dark tiles that are locked in place. It’s like a crossword puzzle of numbers! There are 100 hand-crafted puzzles ranging from easy to extremely challenging. But don't worry! If you get stuck, you can tap the lightbulb button to earn a hint. You can even create brand new puzzles to play yourself! You choose the size of the puzzle and how many starting tiles to reveal. You'll never run out of new puzzles to play! And if you haven't played Five-O, the board game, be sure to check that one out as well!

Uncover the hidden digits by reasoning, not guessing. 4■2 + ■8■ = 12■5. Guessing gets you nowhere. But follow the carry from the ones column, and the answer narrows to exactly one possibility. FUKUMEN does one thing: missing-digit arithmetic, done beautifully, forever. ■ Features - Endless puzzles, generated on your device From simple addition to full long multiplication with three partial-product rows. You will not see the same puzzle twice. - Exactly one answer, always Each puzzle starts as a completed sum, then digits are hidden — but only up to the point where a second answer would become possible. Every puzzle is verified before it reaches you. No unsolvable boards. No ambiguous boards. - Four difficulties Easy and Normal are addition. Hard and Oni are long multiplication. At Oni, 19 of the 26 cells are blank. - Today's puzzle One puzzle a day, the same one for everyone. Streaks and a calendar keep your history visible. - A real long-form layout Chalk on a blackboard, set vertically the way you'd write it by hand. Tap a blank, type a digit. The board scales up when the numbers are short. - Quiet help Columns that can't work out are tinted, gently — you can turn this off. And if you're truly stuck, a hint opens a single cell. - Records Puzzles solved, streak, average time, best time per difficulty. ■ Who it's for - Sudoku and crossword solvers looking for something that actually uses arithmetic - Anyone who wants to deduce rather than drill - Parents and kids working through missing-digit problems for entrance exams - People building a small daily thinking habit - Anyone who needs a puzzle that works with no signal — trains, planes, anywhere