Coding and Decoding Questions

In a certain code language "TITANIC" is written as "7371835" and "SEMATIC" is written as "6241735". How will "MAINTAIN" be written in that code language?

If PONDERS is coded as ONCDQR, then how will MAT be coded as?

In a certain code, if DOG is written as 4157, then what will MAT be written as ?

In a certain code, 329 means 'you are bad', 419 means 'bad is good' and 195 means 'nothing is bad'. ___ represents 'good'.

If 70*10 = -7, 50*5 = -10 and 10*5 = -2, then find the value of 80*1 = ?

If "#" means "subtraction", "&" means "division", "@" means "addition" and "%" means "multiplication", then 505 & 5 # 4 @ 20 % 5 = ?

If '­' means 'x' , 'x' means '+' , '+' means '÷' and '÷' means '­' , then what will be the value of 40 x 12 + 3 ­ 6 ÷ 60 = ?

If 'how are you' is written as 'ne ki se' and 'where are you' as 'ne bl se' and 'you were here' as 'ke ne jo', then 'how you here' is written as