Time zones and time differences

Sample Time zones and time differences questions

A few of the 1 questions, from easier to harder. Choose your exam board and tier to practise them, with every answer marked.

1. Question 13 marksGrade 4-5
   A flight departs New York at 14 30 (New York local time) and takes 7 hours 40 minutes to reach London. London is 5 hours ahead of New York. (a) Work out the local time in London when the flight lands. [2] (b) State whether the flight lands on the same day it departed, or the next day. [1]
   Show the worked solution

   Flight departs New York at 14 30 and takes 7 h 40 min: the arrival time, still on New York's clock, is $14\,30 + 7\,40 = 22\,10$.

   London is 5 hours ahead of New York, so the LOCAL time in London when the flight lands is $22\,10 + 5\,00 = 27\,10$

What are the common mistakes in Time zones and time differences?

When a pupil makes one of these on Revision Workshop, the marking engine names the mistake and explains it, instead of just marking the answer wrong.

• Correctly finds an elapsed/arrival time in one location's local time but forgets to apply a given time-zone offset to convert it to another location's local time.

  22 10 is the arrival time on New York's own clock - since London is 5 hours AHEAD, the local time in London when the flight lands is 22 10 + 5 hours = 03 10 (the following day), not 22 10 itself.

• Subtracts a time-zone (or similar directional) offset when it should be added, or vice versa, applying it the wrong way round

  London is AHEAD of New York (5 hours later), so the offset must be ADDED to the New York arrival time, not subtracted.

Quick answers about Time zones and time differences

How many Time zones and time differences practice questions are there?

There are 1 self-marking IGCSE Maths question on Time zones and time differences, written for Cambridge IGCSE Mathematics (0580), Cambridge IGCSE (9-1) Mathematics (0980) across Core and Extended tier. Each one is marked instantly and has a full worked solution.

Do I need an account to practise Time zones and time differences?

No. You can start practising Time zones and time differences straight away without an account. A free account keeps your results across sessions, so you can see your progress on this topic over time.