Question

Which of the following is irrnational
$\sqrt{9 \div 16} \\ \sqrt{125 \div 5} \\ \sqrt{11} \\ \sqrt{121}$
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Answer 1

a) root 9/16 = 3/4
b) root 125/5 = root 25 = 5
c) root 11
d) root 121 = 11

Therefore,

c) root 11 is irrational