In the following question, four number pairs are given. In each pair the umber on left side of (-) is related to the number of the right side of (-) with some Logic/Rule /Relation. Three pairs are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers 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)

843 - 1181

THE LOGIC;

(1st number + reverse of 1st number = 2nd number)

1) 729 - 1656,

729 + 927 = 1656

2) 843 - 1181,

843 + 348 = 1191

3) 681 - 867,

681 + 186 = 867

4) 507 - 1212,

507 + 705 = 1212

Thus, 843 - 1181 is the odd one.