The logic followed is: The sum of the digits are added to the numbers, 34 + 7 = 41 (7 is the sum of the digits) 41 + 5 = 46 (5 is the sum of the digits) 46 + 10 = 56 (10 is the sum of the digits) 56 + 11 = 67 (11 is the sum of the digits) 67 + 13 = 80 (13 is the sum of the digits) 80 + 8 = 88 (8 is the sum of the digits) Hence, 88 is the correct answer.