Coding and Decoding Questions

Some equations are solved on the basis of certain system. Find out the correct answer for unsolved equation on that basis: 4 x 5 x 8 = 584, 7 x 3 x 9 = 397, 9 x 7 x 3 = ?

If "A" denotes "added to", "C" denotes "divided by", "D" denotes "multiplied by" and "B" denotes "subtracted from", then 72 C 9 D 2 B 6 A 10 = ?

If UNCOVER is coded as FMXLEVI, then how will TIP be coded as?

If 92 A 42 B 32 = 56 and 72 A 22 B 12 = 44, then 112 A 52 B 72 = ?

If REGAINS is coded as QDFZHMR, then how will PRY be coded as?

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

In a certain code language, "OCEAN" is written as "PEHES". How is "RIVER" written in that code language?

If IMPLORE is coded as GKNJMPC, then how will HUB be coded as?