Find the missing number: Row 1: 7, 9, 54; Row 2: 12, 6, 66; Row 3: 14, 8, ?
Explanation
The same positional rule must explain every row. Here the rule is to multiply the numbers and subtract the second number. Verification of Row 1: (7 × 9) - 9 = 54, exactly matching the given result. Verification of Row 2: (12 × 6) - 6 = 66, again matching the stated result, so the rule is consistent rather than a guess. Apply it unchanged to Row 3: (14 × 8) - 8 = 104. Therefore the missing number is 104, which is option D. The other choices are incorrect: 105, 103 and 112 do not equal (14 × 8) - 8; each would break the rule already verified in both complete rows. A valid missing-number solution cannot switch operations only for the final row. Rechecking the first two examples and then independently recalculating the target row confirms the answer.