Coding and Decoding Questions

If P denotes ÷ , Q denotes x, R denotes + and S denotes ­ then what is the value of 18Q12P4R5S6

In a certain code language, “NOTES” is written as “141520519” and “MAKAR” is written as “13111118”. How is “LOFTS” written in that code language?

If 4 * 7 * 2 = 361 and 5 * 9 * 1 = 480, then 2 * 1 * 3 = ?

If FRIEND is coded as HTKGPF then REVEAL will be coded as:

If 18 x 12 = 206 and 19 x 22 = 408, then 23 x 36 = ?

In a certain code language, "SINGING" is written as "TJOHJOH". How is "DANCING" written in that code language?

If FRISKED is coded as HTKUMGF, then how will SUN be coded as?

If A = 1, AND = 19, then ANT = ?