Coding and Decoding Questions

Some equations are solved on the basis of certain system. Find the correct answer for the unsolved equation on that basis.

5 x 4 x 3 = 70 ,
6 x 5 x 4 = 140
7 x 6 x 5 = ?

If 75$26 = 4, 69$53 = 7 then what is the value of 82$46 = ?

If 8*2 = 3, 14*18 = -2 and 18*2 = 8, then find the value of 14*10 = ?

If in a certain code language, "STUBBORN" is written as "TUVCANQM". How is"TRAINING" written in that code language?

If 9@3=12; 15@4=22; 16@14=4; then what is the value of 6@2=?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?

56 ÷ 8 + 12 - 72 = ?

If SELFIE = LXEYBX, then PHYSICS = ____

In a certain code language, “FAINT” is written as “DYGLR”. How is “METRO” written in that code language?