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

Identify the correct combination of mathematical signs to replace "*" sign in the given equation and balance the equation.

14*6*3*5*4*20

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

If MOMENTUM is coded as EMOMNTUM , then MAGNETIC will be coded as?

In the following question, by using which mathematical operators will the expression become correct?
27 ? 9 ? 18 ? 24 ? 12

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

If 15@7=44; 5@4=18; 6@17=46; then what is the value of 17@4=?