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In a certain code, 'FISH' is coded as '4291' and 'DISH' is coded as '5291'. What is the code for 'F'?
4
5
2
9
4
Identify common letters in both words to isolate the variable, then align remaining digits to the non-matching letters.
Identify common letters in both words to isolate the variable, then align remaining digits to the non-matching letters.
Analyze the given codes
Compare FISH (4291) and DISH (5291). Both share the common letters 'ISH' which correspond to the common digits '291'.
Isolate the unique letters
Since 'ISH' maps to '291', the remaining letter 'F' in FISH must map to the remaining digit '4', and the letter 'D' in DISH must map to the remaining digit '5'.
B: 5 corresponds to D, not F. C: 2 is part of the common sequence ISH. D: 9 is part of the common sequence ISH.
A is correct because by comparing the strings FISH (4291) and DISH (5291), the unique letters F and D correspond to the unique digits 4 and 5 respectively.
In coding-decoding questions with multiple words, always identify the common subset of letters and digits first to simplify the problem.
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