The number (quantities) of something IS or ARE?

To express the quantities, the proper usage of verb is IS or ARE? For example, which of the following sentences are correct?The number of plates is fi

To express the quantities, the proper usage of verb is IS or ARE? For example, which of the following sentences are correct?

The number of plates is five.
The number of plates are five.

Thank you!

or:To express the quantities, the proper usage of verb is IS or ARE? For example, which of the following sentences are correct?The number of plates is five.The number of plates are five.Thank you!

or:I'm not a native but I'm pretty sure in this case it's \"is\

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