1. **Stating the problem:** We are given six 3x1 matrices (vertical stacks of three numbers) each with an arrow pointing to a parenthesis containing a number. For the first three matrices, the number in the parenthesis is given. For the last three, it is missing. We need to find the missing numbers in the parentheses for the last three matrices. 2. **Observing the pattern:** For the first three matrices, the number in the parenthesis matches the middle number of the matrix: - (200, 299, 287) → (299) - (256, 276, 296) → (296) - (288, 298, 278) → (298) 3. **Hypothesis:** The number in the parenthesis is the middle element of the matrix. 4. **Applying the pattern to the last three matrices:** - (258, 294, 289) → (294) - (201, 210, 209) → (210) - (260, 270, 299) → (270) 5. **Conclusion:** The missing numbers in the parentheses are the middle numbers of each matrix. **Final answers:** - (258, 294, 289) → (294) - (201, 210, 209) → (210) - (260, 270, 299) → (270)