Coding and Decoding Questions

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
c_e_cd_f_d_f

In a certain code, "go home" is written as "ta na" and "nice little home" is written as "na ja pa". How is "go" written in that code?

If 1∆-5=5, 4∆7=-28 and -1∆-3=-3, then find the value of 8∆-8 =?

In these questions, the relationship between two elements is shown in the statements. These statements are followed by two conclusions.
Statement:
Y > A < N, Y = B <P
Conclusion:
I. P > A
II. N > B

In a certain code language, "DESIRE" is written as "EGVMWK". How is "RECESS" written in that code language?

In a certain code language, "INSTANT" is written as "IOUWESZ". How is "FORGET" written in that code language?

If 9 $ 4 = 17 and 1 $ 5 = 10, then 3 $ 6 = ?

If QUICKLY is coded as OSGAIJW, then how will HUE be coded as?