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Grid Sum Level 1 Hard maths puzzle involving algebra, column, expressions and grid

Grid Sum – Level 1 – Hard

Home » Puzzles » Grid Sum » Level 1 - Hard » Grid Sum – Level 1 – Hard
Topics: algebra, column, expressions, grid, linear equations, row

Each row and column must add up to the totals shown – but all the values are algebra expressions. Work out the value of x, then fill in the grid using each expression once.

Available Expressions (use each exactly once):
  1. (x - 3)²
  2. (x - 2)(x + 4)
  3. (x + 2)(x - 1)
  4. (x - 3)² + 2
  5. (x + 1)²
  6. (2x + 1)(x - 2)
  7. x² + 3x + 2
  8. x² + 5x + 1
  9. x² + 5x + 2

Example Grid:
91 86 102
106
—
(x + 2)(x - 1)
—
52
(x - 3)²
(x - 3)² + 2
—
121
—
—
—

Your Workings For Grid Sum

Enter your working out in this box:

Then insert your suggested answers in the grid below:

91
86
102
106
(x + 2)(x - 1)
52
(x - 3)²
(x - 3)² + 2
121

Reveal the Answer

Reveal Answer
Additional instructions for Grid Sum (Level 1, Hard)

Grid Sum – Hard

Hard grids reward structure. Keep a small side list of:

  • Rows nearly complete
  • Columns nearly complete
  • Linked unknowns

Use those lists to decide where your next logical move is most powerful.

Full help: Grid Sum

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