How to Play Math Crossword

What Is a Math Crossword?

A math crossword is a crossword-style puzzle made from arithmetic instead of words. Some cells already show operators or fixed numbers, while other cells are blank and need to be filled with the correct values.

Each horizontal and vertical line must form a valid equation. Because the equations cross, every number you place affects more than one part of the puzzle.

Basic Rules

• Only fill the white number cells.
• Operators and equals signs are fixed and cannot be changed.
• Every row and column equation must be mathematically correct.
• The tray shows which values are available for the puzzle.
• A completed puzzle must satisfy the whole grid, not just one line.

The key idea is to solve with both arithmetic and cross-checking. A number that works in one line still has to fit every crossing equation that touches it.

How to Fill the Grid

You can play in two ways. Tap a value in the tray and then choose a cell, or tap a cell first and then choose the value you want to place. The game supports both flows so you can solve in the order that feels most natural.

When both a cell and a value are selected, the number is placed automatically. The selected tray value stays active, which makes it easier to place the same number again if the puzzle needs duplicates.

• Tap an already selected filled cell again to clear it.
• Use Reset if you want to restart the whole board.
• Use Hint when you want one correct value revealed.
• Use Check to confirm whether the full solution is correct.

How Difficulty Works

Difficulty changes the feel of the solve more than the rules. Easy puzzles use simpler numbers and more givens, so the board opens quickly. Medium is a balanced mode with enough structure to get started but enough resistance to stay interesting.

Hard reduces help. You may get very few givens, repeated values in the tray matter more, and the solve depends more heavily on clean deduction rather than quick arithmetic alone.

Tips for Beginners

• Start with 5x5 or 7x7 puzzles.
• Use Easy mode first so you can learn the pattern of crossings.
• Look for completed results and strong givens before scanning the whole board.
• Watch the tray counts because they tell you which numbers are still possible.
• If one area gets stuck, move to a crossing line and return later.

Beginners often improve quickly once they stop trying to solve one line in isolation. The puzzle becomes easier when you let the crossings do part of the work.

Common Mistakes

• Forcing a number because it fits one equation but ignoring the crossing.
• Using up a tray value mentally without checking how many copies remain.
• Staying on one stubborn area for too long instead of rotating to another cluster.
• Jumping into Hard too early and treating confusion as a strategy problem instead of a difficulty mismatch.

The best habit is simple: place only what the board supports, then let each confirmed number create the next opening.

Frequently Asked Questions