Adam has some stickers
He gives away ¹₃ and an additional 10 stickers to Bryan.
He gives away ²₉ of the remainder and 11 more stickers to Chris
and ³₅ of the rest to David.
Adam has 18 stickers left.
How many stickers does he have at first?
Number of stickers that Adam gives to Bryan = ¹₃ of the total + 10
Number of stickers that Adam gives to Chris = ²₉ of the remainder + 11
Number of stickers that Adam gives to David = ³₅ of the rest
Number of stickers left = 18


Working backwards.
1 - ³₅ = ²₅

²₅ of the rest → 18
¹₅ of the rest → 18 ÷ 2 = 9
⁵₅ of the rest → 5 x 9 = 45

1 - ²₉ = ⁷₉

⁷₉ of the remainder = 11 + 45 = 56
¹₉ of the remainder = 56 ÷ 7 = 8
⁹₉ of the remainder = 9 x 8 = 72

1 - ¹₃ = ²₃
²₃ of the total = 72 + 10 = 82
¹₃ of the total = 82 ÷ 2 = 41
³₃ of the total = 3 x 41 = 123

Number of stickers at first = 123

Answer(s): 123