17/1/14 | 00:07:30

Three daughters

In this mini-video it is solved a perplexing riddle at first sight about two childhood friends and the ages of the three daughters of one of them.

    • Participante: Elisa Molanes López Profesora Departamento de Estadística , Universidad Carlos III
    Licencia: Copyright (Licencia propietaria)
    Visto: 121 veces
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