(1) How many numbers are there between 200 and 500, which leave remainder 7 when divided by 9. (2) Solve 1+6+11+ 16 +..........+x = 148. (3) If p is the length of perpendicular from origin to the line then show that (4) Find the co-ordinates of the in-centre of the triangle formed by the lines y = 15, 5x - 12y = 0 & 3x+ 4y = 0. (5) If the lines y = 3x + 1 & 2y = x+3 are equally inclined to the line y = mx + 4, find the value of 'm'.