Direction: In each of the following questions, four words have been given, out of which three are alike in some manner and the fourth one is different. Choose out the odd one.

XYZ, ABC, UVW, DEF, RST, GHI,_ ? 

If PKROK code with 72962 and KRRPK coded with 29972 then how will be coded NJMLZ?

Given set
10.5, 15.0, 21.5 

Select the set in which the numbers are related in the same way as are the numbers of the following sets. (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)

(11, 33, 17)
(18, 44, 21)

What will come in place of question (?) mark in the following series?
CD     FG     JK     ?        UV

If HONESTY is written as ABCXZDQ, how can TONY be written in that code?