Adam has some stickers
He gives away ¹₃ and an additional 90 stickers away to Bryan.
He gives away 10 less than ¹₆ of the remaining stickers to Chris
and ⁴₇ 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 + 90
Number of stickers that Adam gives to Chris = ¹₆ of the remainder - 10
Number of stickers that Adam gives to David = ⁴₇ of the rest
Number of stickers left = 15


Working backwards.
1 - ⁴₇ = ³₇

³₇ of the rest = 15
¹₇ of the rest = 15 ÷ 3 = 5
⁷₇ of the rest = 7 x 5 = 35

1 - ¹₆ = ⁵₆

⁵₆ of the remainder = 35 - 10 = 25
¹₆ of the remainder = 25 ÷ 5 = 5
⁶₆ of the remainder = 6 x 5 = 30

1 - ¹₃ = ²₃
²₃ of the total = 30 + 90 = 120
¹₃ of the total = 120 ÷ 2 = 60
³₃ of the total = 3 x 60 = 180

Number of stickers at first = 180

Answer(s): 180