In how many ways 6 letters can be posted in 5 different letter boxes?
Show Hint
When posting multiple items into different containers, calculate the total possibilities by raising the number of containers to the power of the number of items.
Step 1: Understand the problem.
Each letter can be placed in one of the 5 boxes. Therefore, the total number of ways to post 6 letters is \( 5^6 \).
Step 2: Conclusion.
Thus, the correct number of ways is \( 5^6 \).
Final Answer:
\[
\boxed{5^6}
\]