Hype KenKen
A pocket KenKen. Every row and column uses each number once, and each outlined cage must reach its little math target. Pure logic — no luck, free hints, and your earned Neons never claw back.
Calcudoku (KenKen): how to play, rules & tips
Play Calcudoku, the KenKen-style math puzzle, free online. Fill the grid so each row and column uses every number once, and every outlined cage reaches its math target. No sign-up, no download, free hints.
How to play Calcudoku (KenKen)
On a grid of size N, fill each row and each column with the numbers 1 to N, using each number once per line.
The grid is split into outlined cages. Each cage shows a target and an operation: plus, minus, times or divide. Combine the numbers in the cage with that operation to reach the target. A cage with only one cell simply tells you its number.
Tap a cell, then tap a number on the pad. Erase clears a cell and Reset clears the board. There are no starting numbers, so the cages are the whole puzzle.
Grid sizes and difficulty
There are 10 puzzles. The 4 easy puzzles are 4×4, the 3 medium puzzles are 5×5 and the 3 hard puzzles are 6×6.
Every board has been checked by a solver to have exactly one answer. The free Hint shows a correct cell whenever you need it, and correct cells earn Neons that are never taken back.
Calcudoku (KenKen) tips
- Start with single-cell cages. They are free answers, and each one removes a number from its row and column.
- Minus and divide cages use two cells. List the pairs that work: on a 4×4, a divide-by-2 cage can only be 1 and 2 or 2 and 4.
- Large products are very limiting. On a 6×6 grid, any product that is a multiple of 5 needs a 5 in the cage, since 5 is the only number with that factor.
- Each row adds up to the same total (10 on 4×4, 15 on 5×5, 21 on 6×6). If cages fill most of a row, the leftover cell is easy to find.
- When two cells in one row can only be the same two numbers, no other cell in that row can use them.
Frequently asked questions
Is Calcudoku (KenKen) free?
Yes. HypeGameRoom is free: no sign-up, no download and nothing to buy to play. Arcade games reward Neons, a play-only currency that can never be cashed out.
Can numbers repeat inside a cage?
Yes, as long as they are not in the same row or column. The row and column rules still apply everywhere.
Which order do minus and divide work in?
Either way. Subtract the smaller number from the larger, and divide the larger by the smaller. The target is always a positive whole number.
What sizes are the puzzles?
Easy puzzles are 4×4, medium are 5×5 and hard are 6×6.