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
Grey	4
White	5
Green	6

In each container, the number of grey beads was 60% more than the number of green beads and 90% less than the number of white beads. Given that the total possible points if the group managed to collect all the beads were 1386 points, how many beads were not grey in colour?

Grey	White	Green
8x1		5x1
1x8	10x8
8 u	80 u	5 u

	Grey	White	Green	Total
Number	8 u	80 u	5u
Value	4	5	6
Total value	32 u	400 u	30 u	462 u

100% + 60% = 160%
160% = ¹⁶⁰₁₀₀ =⁸₅

100% - 90% = 10%
10% = ¹⁰₁₀₀ = ¹₁₀

Total number of points collected
= 32 u + 400 u + 30 u
= 462 u

462 u = 1386

1 u = 1386 ÷ 462 = 3

Number of beads not white in colour
= 8 u + 5 u
= 13 u
= 13 x 3
= 39

Answer: 39