Adam has 120 green stickers, red stickers and blue stickers.
15% of the stickers are green.
There are 10 more red stickers than blue stickers.

1. How many blue stickers are there?
2. How many less green stickers than red stickers?

Green	Red	Blue	Total
3 u	17 u = 102		20 u = 120
	1 p + 10	1 p

(a)
15% = ¹⁵₁₀₀ = ³₂₀

Total number of stickers = 20 u
Number of green stickers = 3 u

Number of red and blue stickers
= 20 u - 3 u
= 17 u

20 u = 120

1 u = 120 ÷ 20 = 6

Number of red stickers and blue stickers
= 17 u
= 17 x 6
= 102

Number of blue stickers = 1 p
Number of red stickers = 1 p + 10

Total number of red and blue stickers
= 1 p + 1 p + 10
= 2 p + 10

2 p + 10 = 102
2 p = 102 - 10
2 p = 92

1 p = 92 ÷ 2 = 46

Number of blue stickers
= 1 p
= 46

(b)
Number of green stickers
= 3 u
= 3 x 6
= 18

Number of red stickers
= 1 p + 10
= 46 + 10
= 56

Number of less green stickers than red stickers
= 56 - 18
= 38

Answer(s): (a) 46; (b) 38