Question

100000 is not a perfect cube

Answer 1

no the zeroes not make pair of three ex 1000..00 see

Answer 2

$100000 = 1000 \times 100 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: =(10) {}^{3} \times (10) {}^{2 \div 3}$
so 100000 is not a perfect cube
so your statement is true