The intersection of two sets, $A \cap C$, includes all the elements that are present in both set $A$ and set $C$.

Given:

• $A = \{1, 2, 3, 5\}$
• $C = \{3, 4, 6\}$

The common element between these two sets is $3$.

Thus, $A \cap C = \{3\}$.

Would you like further details or have any questions?

Here are 5 related questions to further explore set theory:

1. What is $A \cup C$ (the union of $A$ and $C$)?
2. What is $A'$, the complement of $A$ in $U$?
3. How can we find $(A \cup C)'$, the complement of $A \cup C$?
4. What is the result of $A \setminus C$ (the difference between $A$ and $C$)?
5. How does the concept of a universal set $U$ influence set operations?

Tip: When dealing with sets, intersections focus on common elements, while unions combine all distinct elements from the sets involved.