The number that is also known as the multiplicative identity is 1. This is because multiplying any number by 1 leaves the original number unchanged.

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Here are five related questions:

1. What is the additive identity in mathematics?
2. What is the difference between an additive identity and a multiplicative identity?
3. How does the multiplicative identity apply in matrices?
4. Can there be more than one multiplicative identity for a set of numbers?
5. What happens when you multiply a number by 0?

Tip: The additive identity is always 0, as adding 0 to any number keeps the number unchanged.