Adam has some stickers
He gives away ¹₃ and an additional 81 stickers away to Bryan.
He gives away 9 less than ²₅ of the remaining stickers to Chris
and ²₅ 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 + 81
Number of stickers that Adam gives to Chris = ²₅ of the remainder - 9
Number of stickers that Adam gives to David = ²₅ of the rest
Number of stickers left = 18


Working backwards.
1 - ²₅ = ³₅

³₅ of the rest = 18
¹₅ of the rest = 18 ÷ 3 = 6
⁵₅ of the rest = 5 x 6 = 30

1 - ²₅ = ³₅

³₅ of the remainder = 30 - 9 = 21
¹₅ of the remainder = 21 ÷ 3 = 7
⁵₅ of the remainder = 5 x 7 = 35

1 - ¹₃ = ²₃
²₃ of the total = 35 + 81 = 116
¹₃ of the total = 116 ÷ 2 = 58
³₃ of the total = 3 x 58 = 174

Number of stickers at first = 174

Answer(s): 174