Meaning of happy number | Babel Free
Definitions
Any number that eventually reaches 1 after some number of iterations of replacing each of its digits by the sum of that digit's squares.
Equivalents
Suomi
onnellinen luku
Examples
“13 is a happy number because 1² + 3² is 10, and 1² + 0² is 1.”
CEFR level
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.
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