Number Puzzles Websites
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Fun and Interesting Facts; Interactive Online Puzzles—All Fun and Games
All Fun and Games is your source for interesting facts and puzzles. Contains over 1,900 fun facts, around 200 puzzles, and more.
1,597,792 
$ 720.00
Kakuro - Play Online Kakuro Puzzles for Free at KakuroConquest.com
Play interactive online kakuro puzzles with different sizes and difficulties for free using an easy to use interface at KakuroConquest.com
2,142,288 $ 720.00