Coding and Decoding Questions

In a certain code, 'book is big' is written as 756; 'big is story' is 764 and 'story book is interesting' is 4356. Which digit represents 'interesting'?

If 30Ω6 = -5, 80Ω2 = -40 and 20Ω4 = -5, then find the value of 70Ω2 = ?

If 14 (16) 18 and 33 (64) 25, then what is the value of ‘A’ in 25 (49) A?

In a certain code, RIPPLE is written as 613382, PREACH is coded as 362457. How is PILLER written in that code?

In a certain code, 327 means 'don't cut tree', 635 means 'plant one tree', 138 means 'tree gives shade' and 4953 means 'we must plant tree'. Which digit represents 'shade'?

If "S" denotes "multiplied by", "V" denotes "subtracted from", "M" denotes "added to" and "L" denotes "divided by", then 11 V 9 M 88 L 11 S 9 = ?

In a certain code language, “TRUMP” is written as “46321” and “GRAIN” is written as “76598”. How is “GRUNT” written in that code language?

If "-" means "plus", "x" means "divided by", "÷" means "multiply" and "+" means "substraction", then