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How is 13 a happy number?

Updated: 12/19/2022
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14y ago

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The sum of the squares of the digits of 13 is 12 + 32 = 10. The sum of the squares of the digits of this result is 12 + 02 = 1. Because this process results in a 1, this number is a happy number.

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Q: How is 13 a happy number?
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