Question

$\sqrt{15 - \sqrt{32 + \sqrt{25 - \sqrt{81} } } }$

Answer 1

$\sqrt{15- \sqrt{32+ \sqrt{25- \sqrt{81} } } } =\\\\ \sqrt{15- \sqrt{32+ \sqrt{25-9} } }=\\\\ \sqrt{15- \sqrt{32+ \sqrt{16} } }=\\\\ \sqrt{15- \sqrt{32+4} } =\\\\ \sqrt{15- \sqrt{36} } =\\\\ \sqrt{15-6} =\\\\ \boxed{\sqrt{9} =\ \textgreater \ \boxed{3}}$