Compare times in, and calculate time differences between, major cities of the world, eg 'Given that London is 10 hours behind Sydney, what time is it in London when it is 6:00 pm in Sydney?'

1. Time Travels 1 - time zone calculations
2. Time Travels 4 - time zone calculations
3. Time Travels 3 - time zone calculations
4. A World Of Difference 4 - international time zones
5. A World Of Difference 3 - international time zones
6. A World Of Difference 2 - international time zones
7. A World Of Difference 1 - international time zones
8. Time Travels 2 - time zone calculations
9. A World Of Difference 5 - international time zones
10. Time Travels 5 - time zone calculations