Verbal Reasoning - Mental Ability Questions

If A means +, B means ×, C means ÷, D means −, then the value of given equation will be?

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

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
KV, LU, MT, ?

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

In the following question, select the missing number from the given series.
1357, 3085, 5282, 8026, ?

In a certain code language, “MAGNET” is written as “WHQJDP”. How is “FRAUDS” written in that code language?

In a certain coded language, 'hit ka tom' is written as 'tie the shoes', 'ka lo fod' is written as 'shoes of leather' and 'lo tin lot' is written as 'leather and raxin'. How is 'of' written in this code language?

In a certain code language, “TALCS” is written as “UENCV”. How is “SPARK” written in that code language?