Directions: Using the digits 1-9, each only once, fill in the blanks to create the smallest possible value for **a**.

### Hint

### Hint

What rows/columns from the first matrix impact

What rows/columns from the second matrix impact

**a**?What rows/columns from the second matrix impact

**a**?### Answer

### Answer

Source: Bryan Anderson

A variant might be to fill in the blanks to find the smallest (or largest) value of |a – b|

Nice Phil. Thanks for suggesting this. You should consider submitting it as a separate problem using the Submit link in the menu bar.