Coding and Decoding Questions

If "A" denotes "multiplied by", "B" denotes "subtracted from", "C" denotes "added to" and "D" denotes "divided by", then

7 B 17 C 88 D 11 A 6 = ?

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, "PAGE" is written as "QCJI". How is "CALL"written in that code language?

If 3 @ 3 * 3 = 3 and 48 @ 4 * 3 = 36, then 91 @ 13 * 2 = ?

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

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

If 6 @ 4 @ 7 = 101 and 2 @ 5 @ 11 = 150, then what is the value of A in A @ 8 @ 9 = 289?

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