To find the arithmetic mean of two pairs of numbers, we calculate the average of each pair separately.

1. First pair: 6 and 18 $\text{Mean} = \frac{6 + 18}{2} = \frac{24}{2} = 12$

2. Second pair: 7 and 27 $\text{Mean} = \frac{7 + 27}{2} = \frac{34}{2} = 17$

So, the arithmetic means are:

• For 6 and 18: 12
• For 7 and 27: 17

Would you like more details or have any questions?

Here are 5 related questions you might find useful:

1. What is the arithmetic mean of 10 and 30?
2. How is the arithmetic mean different from the geometric mean?
3. What is the median of the set {6, 18, 7, 27}?
4. How do you calculate the mean of three or more numbers?
5. What is the arithmetic mean of 15, 25, and 35?

Tip: The arithmetic mean is simply the average of a set of numbers, and it's useful in finding central tendencies.