Adam has 190 stickers.
He has 40 less red stickers than green stickers.
He has 60 less blue stickers than red stickers.
How many less blue stickers than green and red stickers does Adam have?
Choose the smallest group to be 1 u.

Number of blue stickers = 1 u
Number of red stickers = 1 u + 60
Number of green stickers = 1 u + 60 + 40 = 1 u + 100

Total number of stickers
= 1 u + 1 u + 60 + 1 u + 100
= 3 u + 160

3 u + 160 = 190
3 u = 190 - 160
3 u = 30

1 u = 30 ÷ 3 = 10

Total number of green and red stickers
= 1 u + 60 + 1 u + 100
= 2 u + 160

Number of less blue stickers than green and red stickers
= 2 u + 160 - 1 u
= 2 u - 1 u + 160
= 1 u + 160
= 10 + 160
= 170

Answer(s): 170