hard 4×4 Set 28 Form Exercise

Speed Grid (+): Fill in each cell by applying the operation to the row and column headers. Row headers: [6, 1, 8, 7], Column headers: [6, 6, 2, 7]

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Answer: Row 6: [12, 12, 8, 13]; Row 1: [7, 7, 3, 8]; Row 8: [14, 14, 10, 15]; Row 7: [13, 13, 9, 14]

SubType
speed-grid
Difficulty
hard
Operation
+
RowHeaders
  • 6
  • 1
  • 8
  • 7
ColHeaders
  • 6
  • 6
  • 2
  • 7
Cells
  • [12,12,8,13]
  • [7,7,3,8]
  • [14,14,10,15]
  • [13,13,9,14]

Speed Grid (-): Fill in each cell by applying the operation to the row and column headers. Row headers: [9, 6, 2, 9], Column headers: [4, 9, 7, 9]

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Answer: Row 9: [5, 0, 2, 0]; Row 6: [2, 3, 1, 3]; Row 2: [2, 7, 5, 7]; Row 9: [5, 0, 2, 0]

SubType
speed-grid
Difficulty
hard
Operation
-
RowHeaders
  • 9
  • 6
  • 2
  • 9
ColHeaders
  • 4
  • 9
  • 7
  • 9
Cells
  • [5,0,2,0]
  • [2,3,1,3]
  • [2,7,5,7]
  • [5,0,2,0]