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Lucky number

math Maturity 11-13

Some numbers are special.

LuckySieve.gif
LuckySieve.gif
We find them by skipping. First, we take some away. Then we take more away. It is like a game. Can you find them? These are called lucky numbers.

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File:LuckySieve.gif
LuckySieve.gif
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📚 Content adapted from Wikipedia | Readability: FK 13.3 | Vital Level 5