1) 21 p

         2) £11

         3) Neither. The volume of water in the wine-glass
            and wine in the water-jug are the same.

    Notes

  1). If an orange costs R pence and a lemon costs L pence,
               2R + 3L = 119
           and       R = L + 7

      Solving, R = 28, L = 21      

  2).    A + B         = 29
             B + C     = 40
                 C + D = 65
        2A         - D = 0

      Solving, A = 18, B = 11, C = 29, D = 36

  3). Since the wine-glass and the water-jug each contain the 
      same volume of fluid as they did originally, the volume
      transferred one way must equal the the volume
      transferred the other way. (In fact each is 10/11 cl.)

  n points are marked on the circumference of a circle, and
  a straight line joins each pair of points. (You may assume
  that the intersections are all distinct, i.e. no three
  lines meet at a point within the circle.)
  
  1. State the number of straight lines, when n =
       (a) 5    (b) 6    (c) 7    (d) 8

  2. State the number of intersections when n =
       (a) 5    (b) 6    (c) 7    (d) 8 

  3. State the number of distinct areas into which the circle 
     is divided, when n = 
       (a) 3    (b) 4    (c) 5    (d) 6    (e) 7