Question

125⁴²:25⁶³ =..........................................

Answer 1

$125 ^{42}= (5^3)^{42}= 5^{3*42}= 5^{126}$
$25^{63}=(5^2)^{63}= 5^{2*63}=5^{126}$

$5^{126}: 5^{126}=1$