how do you calculate for the local time in Cairo, Beijing, Sydney, Washington DC, thailand, los angeles, new delhi,vancouver and moscow if the data given is London(GMT) 5:00pm monday.

To calculate the local time in different cities based on the given reference time in London, you need to consider the time zone differences. This can be done by adding or subtracting the respective time differences from the reference time. Here are the steps to calculate the local time in the mentioned cities:

1. Determine the time zone differences for each city related to GMT (Greenwich Mean Time) or London time. You can use a world time zone map or search for the time zone offsets online. Here are the time differences for the cities you provided:

- Cairo: GMT+2
- Beijing: GMT+8
- Sydney: GMT+11
- Washington DC: GMT-5
- Thailand: GMT+7
- Los Angeles: GMT-8
- New Delhi: GMT+5:30
- Vancouver: GMT-7
- Moscow: GMT+3

2. Adjust the reference time of London using the time differences you obtained:

- Cairo: Add 2 hours to the reference time (London + 2 hours)
- Beijing: Add 8 hours to the reference time (London + 8 hours)
- Sydney: Add 11 hours to the reference time (London + 11 hours)
- Washington DC: Subtract 5 hours from the reference time (London - 5 hours)
- Thailand: Add 7 hours to the reference time (London + 7 hours)
- Los Angeles: Subtract 8 hours from the reference time (London - 8 hours)
- New Delhi: Add 5.5 hours to the reference time (London + 5.5 hours)
- Vancouver: Subtract 7 hours from the reference time (London - 7 hours)
- Moscow: Add 3 hours to the reference time (London + 3 hours)

3. Calculate the local time for each city using the adjusted times from step 2.

Here's the local time in each city based on the given London time of 5:00 PM Monday:

- Cairo: 7:00 PM Monday
- Beijing: 1:00 AM Tuesday
- Sydney: 4:00 AM Tuesday
- Washington DC: 12:00 PM Monday
- Thailand: 12:00 AM Tuesday
- Los Angeles: 9:00 AM Monday
- New Delhi: 10:30 PM Monday
- Vancouver: 9:00 AM Monday
- Moscow: 8:00 PM Monday

Please note that these calculations are based on the time differences and may be subject to daylight saving time adjustments, if applicable.