Impossible Eggs

The rate at which each chicken lays eggs is

$laying\quad rate\quad =\quad \frac { 1.5\quad eggs }{ 1.5\quad chickens\quad \times \quad 1.5\quad days } \quad =\quad \frac { 2 }{ 3 } \quad eggs\quad per\quad chicken\quad per\quad day$

Then, for 12 chickens in 7 days,

$number\quad of\quad eggs\quad =\quad \cfrac { 2 }{ 3 } \quad eggs\quad per\quad chicken\quad per\quad day\quad \times \quad 12\quad chickens\quad \times \quad 7\quad days\\ \boxed { number\quad of\quad eggs\quad =\quad 56 }$

(Chickens, Eggs, Days) (1.5, 1.5, 1.5) (3, 3, 1.5) (12, 12, 1.5) (12, 24, 3) (12, 8, 1) (12, 56, 7)