Discussion
If in a certain code language 'CALENDER' is coded as 'DMZDQFCO', then how would 'DISTANCE' be coded ?
Answer: B
DISTANCE is coded as STHEDDMB.
Split CALENDER into halves, CALE and NDER, and reverse each: ELAC and REDN. Then shift the letters alternately back one and forward one: E-1 = D, L+1 = M, A-1 = Z, C+1 = D gives DMZD; R-1 = Q, E+1 = F, D-1 = C, N+1 = O gives QFCO. Together: DMZDQFCO.
For DISTANCE: halves DIST and ANCE reversed are TSID and ECNA. T-1 = S, S+1 = T, I-1 = H, D+1 = E gives STHE; E-1 = D, C+1 = D, N-1 = M, A+1 = B gives DDMB. So the code is STHEDDMB; the other options each have at least one wrong letter.
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