The sum of $4 + 6$ is:

$4 + 6 = 10$

Would you like more details on basic addition or have any questions?

Here are five related questions:

1. What is $7 + 8$?
2. Can you find the sum of $15 + 25$?
3. What is the result of $100 + 200$?
4. How does addition differ from multiplication?
5. Can you explain how addition works with negative numbers?

Tip: In addition, the order of the numbers doesn't matter (this is called the "commutative property"). So $4 + 6 = 6 + 4$.