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Chasing numbers
(2016)
Chasing numbers
(2012)
Ratio match
(Wolfram Demonstrations Project, 2016)
Ratio match
(Wolfram Demonstrations Project, 2011)
Crossed numbers
(Mídias Digitais para Matemática (MDMat), 2016)
Crossed numbers
(Mídias Digitais para Matemática (MDMat), 2012)