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Natural numbers are classified into even and odd based on their divisibility by two. An interesting way to conceptualize even numbers is to think of pairs. For instance, if you have six socks, they can be perfectly grouped into three pairs, making six an even number. Conversely, having seven socks means one will remain without a matching pair, designating it as an odd number.
Graphical Representation: The Number Line
Utilizing a number line provides an effective means to represent natural numbers visually. On this line, each point corresponds to a natural number, demonstrating their order and relationship. For example, marking points for each number: