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The puzzle provided consists of a series of pairs of numbers with a corresponding result. To solve the puzzle, let's analyze the pattern:

Given:
- \(2, 1 = 11\)
- \(4, 2 = 22\)
- \(5, 3 = 32\)
- \(6, 5 = 51\)

We need to determine the value of \(8, 4\).

### Analyzing the Pattern:
Looking at the examples:
1. \(2, 1 = 11\) → \(11\) could be formed by writing down \(1\) followed by \(1\) (reverse concatenation of \(2, 1\)).
2. \(4, 2 = 22\) → \(22\) could be formed by writing down \(2\) followed by \(2\) (reverse concatenation of \(4, 2\)).
3. \(5, 3 = 32\) → \(32\) could be formed by writing down \(3\) followed by \(2\) (reverse concatenation of \(5, 3\)).
4. \(6, 5 = 51\) → \(51\) could be formed by writing down \(5\) followed by \(1\) (reverse concatenation of \(6, 5\)).

The pattern is that the result is the reverse of the concatenation of the two numbers.

### Applying the Pattern:
For \(8, 4\):
- Reverse the concatenation of \(8\) and \(4\) gives us \(48\).

So, \(8, 4 = 48\).

Would you like to ask anything else or need a detailed explanation on any step? Here are 8 relative questions to think about:

1. What if the pattern was based on arithmetic operations?
2. How would the sequence change if an additional pair were added?
3. Can you think of other patterns that could fit this sequence?
4. What happens if we reverse the order of numbers in the pairs?
5. Is there a connection between the sum of the pairs and the result?
6. How would the puzzle change if only the second number in the pair changed?
7. Could this be generalized to work with larger numbers?
8. What if the pairs were given in a different order?

**Tip:** When solving puzzles, always look for patterns such as arithmetic sequences, reversals, or concatenations.

Learn how to solve a pattern recognition puzzle involving number pairs and reversal. Understand the method to derive the correct result using concatenation and reversal of numbers. Suitable for puzzle enthusiasts and those interested in pattern recognition.

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