It is not possible for Aryana to seat 253 people at 12 tables with the same number of people at each table.
Using the divisibility tests to check if the situation is possible
From the question, we have the following parameters that can be used in our computation:
People = 253
Sits = 12
This means that the number of people per sit is
People per sit = People/Sits
Substitute the known values into the equation
People per sit = 253/12
Evaluate
People per sit = 21.083
The decimal value implies that it is not possible for Aryana to seat 253 people at 12 tables with the same number of people at each table.
This is so because a person cannot be divided to several sits