During a telematch, each group of students was supposed to collect as many coloured balls as possible. Each colour represented a certain point as tabulated:

Colours	Points
Gold	4
Blue	6
Silver	9

In each container, the number of gold balls was 20% more than the number of silver balls and 70% less than the number of blue balls. Given that the total possible points if the group managed to collect all the balls were 1512 points, how many balls were not gold in colour?

Gold	Blue	Silver
6x1		5x1
3x2	10x2
6 u	20 u	5 u

	Gold	Blue	Silver	Total
Number	6 u	20 u	5u
Value	4	6	9
Total value	24 u	120 u	45 u	189 u

100% + 20% = 120%
120% = ¹²⁰₁₀₀ =⁶₅

100% - 70% = 30%
30% = ³⁰₁₀₀ = ³₁₀

Total number of points collected
= 24 u + 120 u + 45 u
= 189 u

189 u = 1512

1 u = 1512 ÷ 189 = 8

Number of balls not gold in colour
= 20 u + 5 u
= 25 u
= 25 x 8
= 200

Answer: 200