1. (a)
2. 
  (a)0.0181 Answer is correct for any number between 0.0182 to 0.0183
  (b)0.1366 Answer is correct for any number between 0.136 to 0.137
  (c)0.0025 Answer is correct for any number between 0.0024 to 0.0026
3. ii
4 i) 2 ii) 5
5.(a) 
    (i)10810
    (ii)40513
  (b) 9
6.(a) 
    (i)2
    (ii)5   
  (b) 
    (i)21
    (ii)50 
  (c) 
    (i)9
    (ii)125 
  (d) 
    (i)20
    (ii)41
7)
  a) ii
  b) iii