The above represents a Venn diagram. The universal set is the set of all positive integers.

Let be the set of all multiples of 2; let be the set of all multiples of 3; let be the set of all multiples of 5.

As you can see, the three sets divide the universal set into eight regions. Suppose each positive integer was placed in the correct region. Which of the following numbers would be in the same region as 873?

Which of the following sets is closed under multiplication?

What is the power set for the data set?