Find the missing number: Row 1: 8, 7, 56; Row 2: 10, 9, 90; Row 3: 12, 6, ?
Explanation
The same positional rule must explain every row. Verification of Row 1: 8 × 7 = 56, exactly matching the given result. Verification of Row 2: 10 × 9 = 90, again matching the stated result, so the rule is consistent rather than a guess. Apply it unchanged to Row 3: 12 × 6 = 72. Therefore the missing number is 72, which is option B. 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.