Add the squares of the digits a whole number to produce a number.
If your repeat this procces and end up with 1 , you have a hppy number.
eg
32=9+4=13=1+9+10=1+0=1
andi t has to be greater than 40
Happy Numbers
2008-03-07 1:12 pm
回答 (2)
2008-03-07 6:13 pm
✔ 最佳答案
44 = 16+16 = 32 = 9+4 = 13 = 1+9 = 10 = 1+0 = 12008-03-07 10:19:42 補充：
68=36+64=100=1+0+0=1
82=64+4=68=36++64=100=1+0+0=1
86=64+36=100=1+0+0=1
91=81+1=82=64+4=68=36++64=100=1+0+0=1
94=81+16=97=81+49=130=1+9+0=10=1+0=1
97=81+49==130=1+9+0=10=1+0=1
100=1+0+0=1
2008-03-07 10:21:39 補充：
49=16+81=97=81+49==130=1+9+0=10=1+0=1
70=49+0=49=16+81=97=81+49==130=1+9+0=10=1+0=1
2008-03-17 3:30 am
These numbers are available from the mathworld and wiki website, not really interesting.
收錄日期: 2021-04-13 18:45:20
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080307000051KK00285