Adam has 100 blue stickers, green stickers and red stickers.
30% of the stickers are blue.
There are 10 more green stickers than red stickers.

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

Blue	Green	Red	Total
3 u	7 u = 70		10 u = 100
	1 p + 10	1 p

(a)
30% = ³⁰₁₀₀ = ³₁₀

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

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

10 u = 100

1 u = 100 ÷ 10 = 10

Number of green stickers and red stickers
= 7 u
= 7 x 10
= 70

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

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

2 p + 10 = 70
2 p = 70 - 10
2 p = 60

1 p = 60 ÷ 2 = 30

Number of red stickers
= 1 p
= 30

(b)
Number of green stickers
= 1 p + 10
= 30 + 10
= 40

Number of blue stickers
= 3 u
= 3 x 10
= 30

Number of more green than blue stickers
= 40 - 30
= 10

Answer(s): (a) 30; (b) 10