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Category: | Series |

Submitted By: | dunchen22 |

Fun: | (2.18) |

Difficulty: | (3.08) |

What comes next in this series:

11, 31, 22, 21, 10, 31, 12, 40, 20...

The numbers represent how many dots and dashes (respectively) are in each Morse code letter of the alphabet. So A = dot-dash (1 dot, 1 dash = 11), B = dash-dot-dot-dot (3 dots, 1 dash = 31), etc. I ended on I = dot-dot (2 dots, no dashes = 20) so next is J = dot-dash-dash-dash (1 dot, 3 dashes = 13). Here is the rest of the series if you want it:

12, 31, 02, 11, 03, 22, 13, 21, 30, 01, 21, 31, 12, 22, 13, 22

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