Grid Sum Puzzle

Grid Sum – Level 1 – Easy

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.

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

Example Grid:
10 11 13
11
x
11
x - 1
2x
12
x² - x

Your Workings For Grid Sum

Enter your working out in this box:

Then insert your suggested answers in the grid below:

10
11
13
11
x
11
x - 1
2x
12
x² - x

Reveal the Answer

Additional instructions for Grid Sum (Level 1, Easy)

Grid Sum – Easy

Work systematically: don’t guess — calculate.

  • Choose the row/column with the fewest blanks.
  • Fill in the missing number using subtraction from the total.
  • Cross-check immediately with the intersecting line.

Momentum tip: after each correct placement, scan the whole grid again — something else may now have only one blank.

Full help: Grid Sum

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