The happy number can be

  1. The happy number can be defined as a number which returns 1 when replaced by the sum of the square of each digit. For instance,
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  2. The happy number can be defined as a number which returns 1 when replaced by the sum of the square of each digit. For instance,
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  3. The happy number can be defined as a number which returns 1 when replaced by the sum of the square of each digit. For instance,
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    2. hatemaths asked by hatemaths
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  4. The happy number can be defined as a number which returns 1 when replaced by the sum of the square of each digit. For
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  5. The happy number can be defined as a number which returns 1 when replaced by the sum of the square of each digit. For
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  6. The happy number can be defined as a number which returns 1 when replaced by the sum of the square of each digit. For instance,
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    2. songoku asked by songoku
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  7. The happy number can be defined as a number which returns 1 when replaced by the sum of the square of each digit. For instance,
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  8. The happy number can be defined as a number which returns 1 when replaced by the sum of the square of each digit. For instance,
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    2. jade asked by jade
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  9. The happy number can be defined as a number which returns 1 when replaced by the sum of the square of each digit. For instance,
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  10. The happy number can be defined as a number which returns 1 when replaced by the sum of the square of each digit. For instance,
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