Flynn and Ryan had 90 stickers in total. Ryan had 18 stickers more than Flynn at first. After Flynn and Ryan played a game with Barbara, Flynn had ⁵₈ as many stickers as Ryan. If Flynn lost as many stickers as Ryan to Barbara, find the number of stickers that Flynn lost to Barbara.

	Flynn	Ryan	Difference
Before	1 u	1 u + 18	18
Change	- ?	- ?
After	5 p	8 p	3 p

Total number of stickers at first
= 1 u + 1 u + 18 
= 2 u + 18

2 u + 18 = 90
2 u = 90 - 18
2 u = 72

1 u = 72 ÷ 2 = 36

Since Flynn lost the same number of stickers as Ryan, the difference in the number of stickers between Flynn and Ryan at first and in the end remains the same.

Difference in the number of stickers in the end
= 8 p - 5 p
= 3 p

3 p = 18

1 p = 18 ÷ 3 = 6

Number of stickers that Flynn lost to Barbara
= 1 u - 5 p
= 36 - 5 x 6
= 36 - 30
= 6

Answer(s): 6