2020 AMC 8 Problems/Problem 12
Revision as of 00:53, 18 November 2020 by Iirishabii (talk | contribs)
Solution 1
Notice that =
and we can combine the numbers to make a bigger factorial. To change
to
we need to multiply
by
which equals
Therefore, we have
After canceling the
we have
Thus,
-iiRishabii