Adam has some stickers
He gives away ¹₃ and an additional 17 stickers to Bryan.
He gives away ⁴₉ of the remainder and 11 more stickers to Chris
and ³₈ of the rest to David.
Adam has 15 stickers left.
How many stickers does he have at first?
Number of stickers that Adam gives to Bryan = ¹₃ of the total + 17
Number of stickers that Adam gives to Chris = ⁴₉ of the remainder + 11
Number of stickers that Adam gives to David = ³₈ of the rest
Number of stickers left = 15


Working backwards.
1 - ³₈ = ⁵₈

⁵₈ of the rest → 15
¹₈ of the rest → 15 ÷ 5 = 3
⁸₈ of the rest → 8 x 3 = 24

1 - ⁴₉ = ⁵₉

⁵₉ of the remainder = 11 + 24 = 35
¹₉ of the remainder = 35 ÷ 5 = 7
⁹₉ of the remainder = 9 x 7 = 63

1 - ¹₃ = ²₃
²₃ of the total = 63 + 17 = 80
¹₃ of the total = 80 ÷ 2 = 40
³₃ of the total = 3 x 40 = 120

Number of stickers at first = 120

Answer(s): 120