Series con operaciones básicas

PRIMERA SERIE : 21 , 28 , ____________________ , ____________________ , 49 , ____________________ , 63 , ____________________ , ____________________ , 84 , ____________________ , ____________________ , 105 , ____________________ , 119 .

SEGUNDA SERIE : 500 , 485 , ____________________ , 455 , ____________________ , ____________________ , 410 , ____________________ , ____________________ , ____________________ , 350 , ____________________ , ____________________ .

TERCERA SERIE : 15625 , 3125 , 625 , ____________________ , ____________________ , ____________________ , 1 .