Express as a pure surd:
         (i) (ii) (iii) 
         (iv) (v) (vi)

59 Simplify by rationalising the denominator: 60 Which of the following is surds:
         (i)
         (ii)
         (iii) 3÷ 6
         62 Express as a mixed surd in its simplest form:
         (i) (ii) (iii)
         (iv) (v) (vi) 63 Which is greater?
        (i) or 
         (ii) or
         (iii) or
         (iv) or
         (v) or
         (vi) or