The least among the following is:
1÷0.2 =$\dfrac{1}{0.2} $=$ \dfrac{10}{2} $= 5;
0.2 = 0.222...;
(0.2)2 = 0.04.
0.04 < 0.2 < 0.22....<5.
Since 0.04 is the least, so (0.2)2is the least.
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