1
Speed Grid (+): Fill in each cell by applying the operation to the row and column headers. Row headers: [8, 7, 1, 5], Column headers: [1, 9, 3, 8] =
2
Speed Grid (+): Fill in each cell by applying the operation to the row and column headers. Row headers: [6, 1, 9, 4], Column headers: [4, 6, 1, 6] =