Question 1:

In a certain code language, "APPLE" is written as "DSSOH". How is "MANGO" written in that code language?

Explanation: Each letter in the word is replaced by the letter that comes three places after it in the English alphabet. Therefore, "MANGO" is written as "PDNFT".

Question 2:

In a certain code language, "TRAIN" is written as "WZRMK". How is "LOCOMOTIVE" written in that code language?

Explanation: Each letter in the word is replaced by the letter that is three places before it in the English alphabet. Therefore, "LOCOMOTIVE" is written as "IJGKPNRXIZ".

Question 3:

In a certain code language, "FRIEND" is written as "IFUJOF". How is "PLEASANT" written in that code language?

Explanation: Each letter in the word is replaced by the letter that comes one place after it in the English alphabet. Therefore, "PLEASANT" is written as "QMFBOBUO".

Question 4:

In a certain code language, "CAT" is written as "FCA". How is "DOG" written in that code language?

Explanation: Each letter in the word is replaced by the letter that comes one place after it in the English alphabet. Therefore, "DOG" is written as "FOH".

Question 5:

In a certain code language, "APPLE" is written as "ZKKOV". How is "ORANGE" written in that code language?

Explanation: Each letter in the word is replaced by the letter that comes two places before it in the English alphabet. Therefore, "ORANGE" is written as "KNLOID".