Some places maintain a zone time of -13. What are the time and date at Greenwich if the zone time and date are 2152, 10 January?

Correct Answer: Option B — 0852, 10 January

Zone time equals Greenwich Mean Time plus the zone description. With a zone time of 2152 on 10 January and a zone of -13, subtract 13 hours to determine Greenwich time, yielding 0852 on 10 January.