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

Colours	Points
Purple	3
Silver	6
Green	8

In each container, the number of purple beads was 20% more than the number of green beads and 50% less than the number of silver beads. Given that the total possible points if the group managed to collect all the beads were 650 points, how many beads were not purple in colour?

Purple	Silver	Green
6x1		5x1
1x6	2x6
6 u	12 u	5 u

	Purple	Silver	Green	Total
Number	6 u	12 u	5u
Value	3	6	8
Total value	18 u	72 u	40 u	130 u

100% + 20% = 120%
120% = ¹²⁰₁₀₀ =⁶₅

100% - 50% = 50%
50% = ⁵⁰₁₀₀ = ¹₂

Total number of points collected
= 18 u + 72 u + 40 u
= 130 u

130 u = 650

1 u = 650 ÷ 130 = 5

Number of beads not purple in colour
= 12 u + 5 u
= 17 u
= 17 x 5
= 85

Answer: 85