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
Brown	3
Gold	6
Green	7

In each container, the number of brown beads was 40% more than the number of green beads and 70% less than the number of gold beads. Given that the total possible points if the group managed to collect all the beads were 2940 points, how many beads were not brown in colour?

Brown	Gold	Green
7x3		5x3
3x7	10x7
21 u	70 u	15 u

	Brown	Gold	Green	Total
Number	21 u	70 u	15u
Value	3	6	7
Total value	63 u	420 u	105 u	588 u

100% + 40% = 140%
140% = ¹⁴⁰₁₀₀ =⁷₅

100% - 70% = 30%
30% = ³⁰₁₀₀ = ³₁₀

Total number of points collected
= 63 u + 420 u + 105 u
= 588 u

588 u = 2940

1 u = 2940 ÷ 588 = 5

Number of beads not gold in colour
= 21 u + 15 u
= 36 u
= 36 x 5
= 180

Answer: 180