184 x 216 - 81 + 119 / 0.7 = 184/216 - 81 + 170 Using the concept of digit roots we can say digit root of 180 = 1 + 8 + 4 = 13 = 1 + 3 = 4. i.e. we keep adding the digits till we get the sum as a single digit number. Digit root of 216 is 0 Digit root of 81 is 0. Digit root of 170 isl + 7 + 0 = 8 Thus the digit root of the answer must be (4)(0) - 0 + 8 = 8. (39439) digit root is3 + 9 + 4 + 3 + 9 = 28 2 + 8 = 10 1 + 0 = 1. Digit root is 1. Similarly the digit root of 39394 is 1 digit root of 94934 is 2. Where as the digit root of 33949 is 1. Thus none of them could be the answer, hence the answer is choice (5) or 184x216-81 + 170 = 39833.