Coding and Decoding Questions

If 12 (20) 16 and 21 (35) 28, then what is value of A in 48 (80) A ?

If CHANTED is coded as ZEXKQBA, then how will MAY be coded as?

In a certain code language "CANADA" is written as "BZMBEB". How is "SYDNEY" written in that code language?

In a certain code CAMEL is written as MFNBD. How shall TIGER be written in that code?

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

X_ZX_YY_ZX_Z

In a certain code language, "BISLERI" is written as "IREBISL". How is "PANTHER" written in that code language?

In a certain code language, “MOCKS” is written as “NNDJT”. How is “FLAME” written in that code language?

If 16α1 = 8, 14α6 = 42 and 12α5 = 30, then find the value of 2α6 = ?