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

Example Grid:
82 144 107
121
—
—
(2x + 1)(x - 2)
82
—
—
—
130
—
(x + 3)² - 4
(x + 2)(x - 1)

Your Workings For Grid Sum

Enter your working out in this box:

Then insert your suggested answers in the grid below:

82
144
107
121
(2x + 1)(x - 2)
82
130
(x + 3)² - 4
(x + 2)(x - 1)

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

Next Puzzle →
Concepts covered in this puzzle:

You must be logged in to view this answer.