2017-II-04

Ans: D
Note that ${\displaystyle \frac{1}{{\pi }^4}}=0.010265982$. Then we have

$\begin{array}{cl}& 0.010265982\\ =& 0.0103\text{(correct to }3\text{ signifiant figures)}\end{array}$

$\begin{array}{cl}& 0.010265982\\ =& 0.01027\text{(correct to }4\text{ signifiant figures)}\end{array}$

$\begin{array}{cl}& 0.010265982\\ =& 0.01027\text{(correct to }5\text{ decimal places)}\end{array}$

$\begin{array}{cl}& 0.010265982\\ =& 0.010266\text{(correct to }6\text{ decimal places)}\end{array}$