Find the value of and hence find the value of

(i)

(ii)

Simplify:

(i)

(ii)

Evaluate and hence find the value of

Find the square root of each of the following correct to three places of decimal.

(i) 5 (ii) 7

(iii) 17 (iv) 20

(v) 66 (vi) 427

(vii) 1.7 (viii) 23.1

(ix) 2.5 (x) 237.615

(xi) 15.3215 (xii) 0.9

(xiii) 0.1 (xiv) 0.016

(xv) 0.00064 (xvi) 0.019

(xvii) (xviii)

(xix) (xx)

Find the square root of 12.0068 correct to four decimal places.