Adam has 120 red stickers, green stickers and blue stickers.
30% of the stickers are red.
There are 10 more green stickers than blue stickers.

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

Red	Green	Blue	Total
3 u	7 u = 84		10 u = 120
	1 p + 10	1 p

(a)
30% = ³⁰₁₀₀ = ³₁₀

Total number of stickers = 10 u
Number of red stickers = 3 u

Number of green and blue stickers
= 10 u - 3 u
= 7 u

10 u = 120

1 u = 120 ÷ 10 = 12

Number of green stickers and blue stickers
= 7 u
= 7 x 12
= 84

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

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

2 p + 10 = 84
2 p = 84 - 10
2 p = 74

1 p = 74 ÷ 2 = 37

Number of blue stickers
= 1 p
= 37

(b)
Number of green stickers
= 1 p + 10
= 37 + 10
= 47

Number of red stickers
= 3 u
= 3 x 12
= 36

Number of more green than red stickers
= 47 - 36
= 11

Answer(s): (a) 37; (b) 11