Adam has some green stickers and red stickers.
If Adam gives away 16 green stickers,
the green stickers will be 10% as many as the red stickers.
If Adam gives away 245 red stickers,
the green stickers will be 40% as many as the red stickers.

1. How many green stickers are there? 
2. How many red stickers are there? 

	Scenario 1		Scenario 2
	Green	Red	Green	Red
Before	1 u + 16	10 u	2 p	5 p + 245
Change	- 16	No change	No change	- 245
After	1 u	10 u	2 p	5 p

(a)
10% = ¹⁰₁₀₀ = ¹₁₀
40% = ⁴⁰₁₀₀ = ²₅

Scenario 1
Number of green stickers at first = 1 u + 16
Number of red stickers at first = 10 u

Scenario 2
Number of green stickers at first = 2 p
Number of red stickers at first = 5 p + 245

1 u + 16 = 2 p --- (1)
10 u = 5 p + 245 --- (2)

(1) _{x 10}
10 u + 160 = 20 p
10 u = 20 p - 160 --- (3)

(3) = (2)
20 p - 160 = 5 p + 245
20 p - 5 p = 160 + 245
15 p = 405

1 p = 405 ÷ 15 = 27

Number of green stickers
= 2 p
= 2 x 27
= 54

(b)
Number of red stickers at first
= 5 p + 245
= 5 x 27 + 245
= 135 + 245
= 380

Answer(s): (a) 54; (b) 380