In the following number-pairs, the second mumber is obtained by applying certain mathematical operations to the first number. Which mumbers should replace X and Y so that the pattern followed by the two numbers on the left side of:: is same as that on the right side of :: ? (NOTE: Operations should be performed on the whole numbers, without breaking down the mumbers into its constituent digits. E.g. 13-Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed) X : 120 :: 4 : Y Ans 1.