Let's sum these two numbers.
6 + 18 = 24 total hours.
In every 12-hour the clock format changes AM to PM or the opposite PM to AM. So we need to divide 12 with the result 24.
There are 2 times 12 number in the 24
If the result is ODD number the time format will change the opposite side. If the result is EVEN number the time format will be the same.
Answer :12am
What is 18 hours from 6pm ? = 12am.
Add 18 hours to 6pm is equal 12am.