How Do You Find Out A Happy Or Sad Number Without Doing Too Much Work?

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I want to find out how to know what numbers are happy without having to square all the Digits all the time.

Suggested Reading:

Happiness: A Guide to Developing Life's Most Important SkillHappiness: A Guide to Developing Life's Most Important SkillA molecular biologist turned Buddhist monk, described by scientists as "the happiest man alive," demonstrates how to develop the inner conditions for true happiness.
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Comments on How Do You Find Out A Happy Or Sad Number Without Doing Too Much Work? Leave a Comment

January 26, 2010

chiffmon @ 1:30 am #

What is a happy number?

ND @ 7:00 am #

Another way to know which is which is to remember it, and it is the only one way without working it out.
Here are the first few happy numbers:
1, 7, 10, 13, 19, 23, 28, 31, 32, 44, 49, 68, 70, 79, 82, 86, 91, 94, 97, 100, 103, 109, 129, 130, 133, 139, 167, 176, 188, 190, 192, 203, 208, 219, 226, 230, 236, 239, 262, 263, 280, 291, 293, 301, 302, 310, 313, 319, 320, 326, 329, 331, 338, 356, 362, 367, 368, 376, 379, 383, 386, 391, 392, 397, 404, 409, 440, 446, 464, 469, 478, 487, 496.
HAPPY
ND

Zywxn @ 1:21 pm #

Use the following sites:http://en.wikipedia.org/wiki/Happy_numbe…http://www.research.att.com/~njas/sequen…
Wikipedia has the list of the second site with an extra 15 numbers.

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