1. Problem: Find the missing number (□) in each vertical line graph where two numbers on top are connected and a vertical line descends to a missing number or given number. 2. Step 1: Understand the pattern. Each pair of numbers on top is connected, and the vertical line leads to a number or a missing number. The missing number is likely related to the two numbers above it. 3. Step 2: Analyze the first example to find the pattern. Example 1: 25 and 9 on top, vertical line down to □. Check if the missing number is the difference, sum, product, or some function of 25 and 9. 4. Step 3: Test difference: 25 - 9 = 16. Test sum: 25 + 9 = 34. Test product: 25 * 9 = 225. Test average: (25 + 9)/2 = 17. 5. Step 4: Check other examples to confirm pattern. Example 2: □ and 64 on top, vertical line down to 10. If the missing number is x, then check if x and 64 relate to 10 by difference, sum, or other. 6. Step 5: Try difference: |x - 64| = 10 => x = 54 or 74. Try sum: x + 64 = 10 (not possible since sum > 10). 7. Step 6: Check example 3: 36 and □ on top, vertical line down to 11. Let missing number be y. Try difference: |36 - y| = 11 => y = 25 or 47. 8. Step 7: Check example 4: 100 and 25 on top, vertical line down to □. Try difference: 100 - 25 = 75. So missing number is 75. 9. Step 8: From examples 2 and 3, the missing number is the number that when subtracted from the other top number gives the bottom number. 10. Step 9: Solve each missing number: 1) 25 and 9, missing number = |25 - 9| = 16 2) x and 64, bottom = 10 => |x - 64| = 10 => x = 54 or 74 (choose 54 as it fits pattern) 3) 36 and y, bottom = 11 => |36 - y| = 11 => y = 25 or 47 (choose 25) 4) 100 and 25, bottom = □ => 75 5) x and 16, bottom = 13 => |x - 16| = 13 => x = 3 or 29 (choose 3) 6) 49 and 81, bottom = □ => |49 - 81| = 32 7) 16 and y, bottom = 14 => |16 - y| = 14 => y = 2 or 30 (choose 2) 8) x and 64, bottom = 19 => |x - 64| = 19 => x = 45 or 83 (choose 45) 9) x and 49, bottom = 19 => |x - 49| = 19 => x = 30 or 68 (choose 30) 10) 100 and 81, bottom = □ => |100 - 81| = 19 11. Final answers: 1) 16 2) 54 3) 25 4) 75 5) 3 6) 32 7) 2 8) 45 9) 30 10) 19 This pattern shows the bottom number is the absolute difference of the two top numbers.