hard 4×4 Set 81 Form Exercise

Speed Grid (+): Fill in each cell by applying the operation to the row and column headers. Row headers: [4, 4, 9, 2], Column headers: [1, 3, 10, 8]

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Answer: Row 4: [5, 7, 14, 12]; Row 4: [5, 7, 14, 12]; Row 9: [10, 12, 19, 17]; Row 2: [3, 5, 12, 10]

SubType
speed-grid
Difficulty
hard
Operation
+
RowHeaders
  • 4
  • 4
  • 9
  • 2
ColHeaders
  • 1
  • 3
  • 10
  • 8
Cells
  • [5,7,14,12]
  • [5,7,14,12]
  • [10,12,19,17]
  • [3,5,12,10]

Speed Grid (+): Fill in each cell by applying the operation to the row and column headers. Row headers: [2, 8, 6, 1], Column headers: [4, 9, 8, 4]

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Answer: Row 2: [6, 11, 10, 6]; Row 8: [12, 17, 16, 12]; Row 6: [10, 15, 14, 10]; Row 1: [5, 10, 9, 5]

SubType
speed-grid
Difficulty
hard
Operation
+
RowHeaders
  • 2
  • 8
  • 6
  • 1
ColHeaders
  • 4
  • 9
  • 8
  • 4
Cells
  • [6,11,10,6]
  • [12,17,16,12]
  • [10,15,14,10]
  • [5,10,9,5]