(4) Let the number be 10x + y From statement I, x-y=7 or y-x=7 From Statement II, x + y = 11....(ii) Now, solving x- y = 7 and x + y = 11, we get x = 9, y = 2 Solving y - x = 7 and x + y = 11, we get y = 9 and x = 2 Hence, the possible numbers are 92 and 29. Cearly, uniqueness of answer is not satisfied. Hence, the correct answer choice is (4).