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In a certain code language, 'pillow blanket bed’ is coded as ‘ma ph st’, ‘bed window door’ is coded as ‘cd le ma’ and ‘door pillow wall’ is coded as ‘st bq cd’. (All the codes are two-letter codes only.) What is the code for 'wall' in that language?
bq
le
st
cd
bq
Identify common words between sentences and their corresponding codes to isolate the unique code for the required word.
Identify common words between sentences and their corresponding codes to isolate the unique code for the required word.
Mapping shared words
Pillow is common to sentence 1 and 3. Codes 'ma ph st' and 'st bq cd' share 'st'. Thus, pillow = st.
Mapping remaining shared words
Door is common to sentence 2 and 3. Codes 'cd le ma' and 'st bq cd' share 'cd'. Thus, door = cd.
Extracting target
In sentence 3 ('door pillow wall' : 'st bq cd'), since door = cd and pillow = st, the only code left for wall is bq.
B: 'le' represents 'window' from sentence 2 (door=cd, bed=ma), C: 'st' represents 'pillow' as identified in step 1, D: 'cd' represents 'door' as identified in step 2.
A is correct because by identifying common codes across the given sentences, we determine that 'pillow' is 'st' and 'door' is 'cd', leaving 'bq' as the only possible code for 'wall'.
When solving substitution coding, always list the common words between sentences first and eliminate them from the code sets to isolate the target word quickly.
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