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Question
$$\sqrt {0.2} = ?$$
Options:
A .  0.02
B .  0.2
C .  0.447
D .  0.632
Answer: Option C
$$\eqalign{
& \,\,\,\,\,4|0\,.\,\overline {20} \,\,\overline {00} \,\,\overline {00} \,\,(.447 \cr
& \,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,16 \cr
& \,\,\,\,\,\,\,\,\,| - - - - - - - - - - \cr
& \,\,\,84|\,\,\,\,\,\,\,\,\,\,4\,00 \cr
& \,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,3\,36 \cr
& \,\,\,\,\,\,\,\,\,\,| - - - - - - - - - - \cr
& \,887|\,\,\,\,\,\,\,\,\,\,\,\,\,\,64\,00 \cr
& \,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,62\,09 \cr
& \,\,\,\,\,\,\,\,\,\,| - - - - - - - - - - \cr
& \therefore \sqrt {0.2} = 0.447 \cr} $$

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