Question

$1$ millennium is equal to how many years?

Answer 1

Representation of millennium in years.

$1$ millennium is equal to one thousand years, i.e.

$\begin{array}{rcl}1\mathrm{millennium}& =& 1000\mathrm{years}\\ \mathrm{and}1\mathrm{centuy}& =& 100\mathrm{years}\end{array}$

Hence,$1\mathrm{millennium}=10\mathrm{centuries}.$

Hence, $1$ millennium is equal to one thousand years or $10$ centuries.