Coding and Decoding Questions

If in a certain language A is coded as 1, B is coded as 2, C is coded as 3, and so on, how is BIDDIC coded in that language?

In a certain code language, "MOTHER" is written as "NPUGDQ". How is "ORANGE" written in that code language ?

In a certain language "BROTHER" is written as "CSPUIFS". How is "SISTER" written in that code language?

A*B means multiply A by B; A@B means divide A by B, A?B means add B to A and A=B means subtract B from A. Then find the value of 10*10 = 5*10 ? 50@10

If 5 * 3 = 19 and 8 * 5 = 49, then what should 6 * 4 be?

In a certain code language, "CUTE" is written as "9251" and "REST" is written as "4135". How is "RESCUE" written in that code language?

In a certain code language, "CAUGHT" is written as "125679" and "HEN" is written as "740". How is "TAUGHT" written in that code language?

If Q = 10 and FAX = 50, then XEROX = ?