The gap of days until both the shows would take place together would be:
- 36 days
Given that,
The schedule of the show = 10, 20, 6, and 45
To find the day after which the show would take place, we will take the LCM of them.
The LCM of 10, 20, 6, and 45 would be 180.
The show happens every fifth day. So,  180 ÷ 5
[tex]= 36 days[/tex]
Thus, 36 days is the correct answer.
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