Adam has some stickers
He gives away ¹₅ and an additional 82 stickers to Bryan.
He gives away ⁴₉ of the remainder and 20 more stickers to Chris
and ³₅ of the rest to David.
Adam has 12 stickers left.
How many stickers does he have at first?
Number of stickers that Adam gives to Bryan = ¹₅ of the total + 82
Number of stickers that Adam gives to Chris = ⁴₉ of the remainder + 20
Number of stickers that Adam gives to David = ³₅ of the rest
Number of stickers left = 12


Working backwards.
1 - ³₅ = ²₅

²₅ of the rest → 12
¹₅ of the rest → 12 ÷ 2 = 6
⁵₅ of the rest → 5 x 6 = 30

1 - ⁴₉ = ⁵₉

⁵₉ of the remainder = 20 + 30 = 50
¹₉ of the remainder = 50 ÷ 5 = 10
⁹₉ of the remainder = 9 x 10 = 90

1 - ¹₅ = ⁴₅
⁴₅ of the total = 90 + 82 = 172
¹₅ of the total = 172 ÷ 4 = 43
⁵₅ of the total = 5 x 43 = 215

Number of stickers at first = 215

Answer(s): 215