Overview
A number crossword uses a crossword-style grid, but the entries are numbers found from arithmetic, number properties or other numerical clues.
Objective
Solve each clue and place the resulting number into the correct Across or Down spaces so crossing digits agree.
What You Need
- Number-crossword grid
- Across and Down numerical clues
- Pencil and optional calculator if allowed
Setup
Check the number of cells for each entry. Solve easy arithmetic or factual clues first and enter only numbers with the correct number of digits.
How to Solve
- Solve a clue.
- Check how many digits the answer must contain.
- Enter the number in the correct direction.
- Use crossing digits to constrain unsolved clues.
- Recalculate any answer that conflicts with several crossings.
- Complete the grid and verify every clue.
Worked Example
If a three-cell clue is “12 × 8,” the answer is 96, which has only two digits and therefore cannot fit a three-cell entry unless leading zeroes are explicitly allowed. That mismatch tells you to recheck the clue or entry length.
Strategy Tips
- Use place value and crossing digits to eliminate impossible answers.
- Estimate arithmetic before calculating exactly to catch obvious errors.
- Write intermediate working beside difficult clues.
Common Mistakes
- Ignoring the required number of digits.
- Putting commas, currency symbols or units into cells unless instructed.
- Assuming a crossing is wrong before rechecking your arithmetic.
Variations & House Rules
Number crosswords may use arithmetic, fractions, dates, Roman numerals, number sequences or general numerical knowledge.
FAQ
Can answers start with zero?
Usually not unless the puzzle explicitly allows leading zeroes.
Is a calculator allowed?
That depends on the puzzle. Many are designed for mental or written arithmetic, so check the instructions.