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To find the mean of the numbers 10, 5, 8, and 13, you follow these steps:

1. **Add the numbers together**:
   \[
   10 + 5 + 8 + 13 = 36
   \]

2. **Count how many numbers there are**: There are 4 numbers.

3. **Divide the sum by the number of values**:
   \[
   \frac{36}{4} = 9
   \]

So, the mean is **9**, which corresponds to option **C**.

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

Here are 5 related questions to expand your knowledge:
1. How is the mean affected if one of the numbers is changed?
2. What is the difference between mean, median, and mode?
3. How do you find the mean of a larger set of numbers?
4. How do you calculate the weighted mean if some values are more important than others?
5. Can the mean of a set of numbers ever be larger than the largest number in the set?

**Tip:** When calculating the mean, always ensure you've included all numbers and divided by the correct count.

What is the mean of the following numbers? 10, 5, 8, 13

Find out how to calculate the mean (average) of the numbers 10, 5, 8, and 13. Learn the step-by-step process, including adding the numbers and dividing by the count. This math problem is perfect for students in Grades 4-6.

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