|Numeral systems by culture|
|Western Arabic (Hindu numerals)
|East Asian numerals|
|other historical systems|
|Positional systems by base|
|2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 20, 24, 27, 30, 36, 60, 64|
|Unary numeral system (Base 1)|
|List of numeral systems|
This is a list of Wikipedia articles on topics of numeral system and "numeric representations"
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Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. Each square carries a letter. To make squares disappear and save space for other squares you have to assemble English words (left, right, up, down) from the falling squares.
Boggle gives you 3 minutes to find as many words (3 letters or more) as you can in a grid of 16 letters. You can also try the grid of 16 letters. Letters must be adjacent and longer words score better. See if you can get into the grid Hall of Fame !
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