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In a certain code, ‘copy book pencil’ is coded as ‘fd rl sg’, ‘pencil crayon eraser’ is coded as ‘bz xw rl’, and ‘crayon copy pen’ is coded as ‘xw sg xo’.What is the code for 'book' in that language? (Note: All the codes are two letter coded only.)
rl
xo
fd
sg
fd
Identify common words across code strings to isolate the unique code for the target word.
Identify common words across code strings to isolate the unique code for the target word.
Analyze Common Words
Compare the three statements: 1) copy book pencil = fd rl sg, 2) pencil crayon eraser = bz xw rl, 3) crayon copy pen = xw sg xo. 'pencil' is common to 1 and 2, and code 'rl' is common to 1 and 2. Thus, pencil = rl.
Isolate Remaining Codes
In 1 and 3, 'copy' is common, and code 'sg' is common. Thus, copy = sg. Substituting 'pencil' = 'rl' and 'copy' = 'sg' into statement 1 ('copy book pencil' = 'fd rl sg'), we are left with 'book' = 'fd'.
A: rl is the code for pencil. B: xo is the code for pen. D: sg is the code for copy.
C is correct because by comparing the given strings, we identify 'rl' as 'pencil', 'sg' as 'copy', and 'xw' as 'crayon', leaving 'fd' as the code for 'book'.
In coding-decoding, always start by identifying the words that appear in the most sentences to quickly eliminate choices.
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