If SCHOOL is coded as TDIPPM, how is TDIPPM coded?
UEJQON
UEJQQN
UEJQPN
UEJPPN
Correct answer: UEJQQN
Solution
The code changes each letter by a fixed pattern. Applying the reverse/forward shift consistently to TDIPPM gives UEJQQN. Hence, UEJQQN is the correct coded form.