A positive number is called a perfect square whenever it is the square of a whole number. The first three perfect squares are $$1$$, $$4$$, and $$9$$. The $$100$$th perfect square is． 
Overseas Competition->Knowledge Point->Number Theory Modules->Perfect Square Numbers->Basic Applications of Square Numbers
The first perfect square is $$1^{2}$$, the $$2$$nd is $$2^{2}$$, and the $$3$$rd is $$3^{2}$$.  With this pattern, the $$100$$th perfect square is $$100^{2} = 100\times100= 10000$$. 