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 SYSTEM is written as RXRSDL.
How can CORRECT be written in that code?

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 37*14 = 17,
69*33 = 34,
91*125 = 72
then what should 28*56 = ?

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

If RESEARCH is $#!#%$&@ then SCARE is

In a certain code, 324 means 'are you alright', 783 means 'you come home' and 9271 means 'we are at home'. Which digit represents 'COME'?

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