The result of $10 + 15$ is $25$.

Would you like a more detailed explanation or have any further questions?

Here are 5 related questions:

1. What is the sum of 23 and 19?
2. How do you add fractions with different denominators?
3. What is the result of adding negative numbers?
4. How can we represent addition visually using a number line?
5. Can you solve 10 + 15 using binary numbers?

Tip: When adding large numbers, it can help to break them down into smaller components (e.g., adding tens first and then ones).