Coding and Decoding Questions

If 9 $ 4 = 17 and 1 $ 5 = 10, then 3 $ 6 = ?

In a certain code language, "DISORDER" is written as "OSIDREDR". How is "PRACTICE" written in that code language?

In a certain code language, "RAIN" is written as "OHBQ". How is "SUMMER" written in that code language?

If MEAT is coded as 135120. then what will be the code for ZEBRA?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
c_e_cd_f_d_f

In a certain code language, "MATCH" is written as "NYWYM" and "BOARD" is written as "CMDNI". How is "PRINT" written in that code language?

In a certain code language the word EXAMPLES is written as EMAXSEPL. How will the word BUOYANCY be written in that language?

In a certain code language, “FRAME” is written as “79635” and “TOWEL” is written as “21854”. How is “WORM” written in that code language?