Question

determine if the following are surd.
no 1.√121
no 2.√0.25
no 3.√128
no 4.√1 whole number 9÷16
no 5.√4000
no 6.√36
no 7.√1.44

Answer 1

The only one I see which is not an "exact" answer is √128

(you could just test with your calculator)