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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. x² + 3x + 2
  2. (x - 2)(x + 4)
  3. x² - x + 7
  4. (2x + 1)(x - 2)
  5. (x - 1)(x + 3)
  6. (x + 3)² - 4
  7. (x - 1)(x + 4)
  8. (x + 1)²
  9. (x - 3)²

Example Grid:
141 110 164
169
—
—
—
131
(x - 1)(x + 3)
(x + 1)²
—
115
—
(x - 3)²
—

Your Workings For Grid Sum

Enter your working out in this box:

Then insert your suggested answers in the grid below:

141
110
164
169
131
(x - 1)(x + 3)
(x + 1)²
115
(x - 3)²

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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