The verified answer to “Solve this Missing Number question: Find the missing number: Row 1: 5, 9, 86; Row 2: 6, 6, 42; Row 3: 7, 10, ?” is 107, option B. The question-specific working supplied with the item states: The same positional rule must explain every row. Here the rule is to add the first number to the square of the second number. Verification of Row 1: 5 + 9² = 86, exactly matching the given result. Verification of Row 2: 6 + 6² = 42, again matching the stated result, so the rule is consistent rather than a guess. Apply it unchanged to Row 3: 7 + 10² = 107. Therefore the missing number is 107, which is option B. The other choices are incorrect: 108, 106 and 117 do not equal 7 + 10²; 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. This working identifies the relevant missing-number relation and connects the given information to the required result. After applying the verified rule, the required value or position is 107. The alternatives 108, 106 and 117 fail because each breaks at least one stated condition, transition, direction or arithmetic step. A plausible-looking option is not sufficient unless it reproduces the complete missing-number relation.
