in this video, we are going to learn about Lucky Numbers, Happy Numbers
So don't forget to watch till the end

0:000:37 Intro
0:3701:03 Sieve
01:03 01:56 Sieve of Lucky Numbers
01:5602:28 Properties of Lucky Numbers
02:28 2:40 Happy Numbers
2:403:00 Luck?
3:003:18 Outro

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if you have any questions you can ask me in the comments.
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