In a certain code language, 'FRIEND' is coded as

Solution

The pattern followed here is as follows: First, from left end, first letter is interchanged with third letter, second letter is interchanged with fourth letter. Similarly, fifth letter is interchanged with sixth letter. F          R         I           E         N         D I           E         F          R         D         N So, FREIND is written as IEFRDN. Similarly, in REVISE R         E         V         I           S         E V         I           R         E         E         S So, REVISE is written as VIREES.