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Number Grid

Einstein

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Play Einstein Number Grid — ThePuzzleLabs

Try this Einstein Number Grid puzzle on ThePuzzleLabs.

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Classic
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How to Play Number Grid

Rules

  • Every row and column is an arithmetic equation.
  • Equations are evaluated strictly left-to-right (no order of operations).
  • Fill in missing numbers (and operations at harder levels) so every equation is correct.
  • Each puzzle has exactly one solution.

Cell Types

  • Square cells — numbers (tap to enter a number)
  • Round cells — operations +, −, ×, ÷ (tap to toggle)
  • = signs separate the equation from its result

Keyboard Shortcuts

  • 0-9 Enter number
  • + - * / Enter operation
  • Space Cycle operations
  • Delete Erase cell
  • ↑↓←→ Navigate
  • Tab Next blank cell
  • U Undo
  • H Hint

Solve This Puzzle?

This will fill in the complete solution. The puzzle will be marked as “solved with reveal” rather than self-solved.

About einstein number grids

Six-by-six grids with twelve interlocking equations, numbers ranging from −25 to 100, and 10 to 15 blank cells. Negative intermediate values are possible, which means you need to track signs carefully through each left-to-right computation.

These grids are designed to resist casual guessing. You will need to chain deductions across several equations before placing a single value. If a row narrows a cell to two possibilities, check both against the column equation — usually only one works. Einstein Number Grid puzzles take 15–30 minutes and are among the hardest arithmetic puzzles on this site.

For a different kind of extreme challenge, try einstein Kakuro or einstein KenKen.