Adam has some stickers
He gives away ¹₃ and an additional 64 stickers away to Bryan.
He gives away 5 less than ¹₆ of the remaining stickers to Chris
and ³₅ of the rest to David.
Adam has 20 stickers left.
How many stickers does he have at first?
Number of stickers that Adam gives to Bryan = ¹₃ of the total + 64
Number of stickers that Adam gives to Chris = ¹₆ of the remainder - 5
Number of stickers that Adam gives to David = ³₅ of the rest
Number of stickers left = 20


Working backwards.
1 - ³₅ = ²₅

²₅ of the rest = 20
¹₅ of the rest = 20 ÷ 2 = 10
⁵₅ of the rest = 5 x 10 = 50

1 - ¹₆ = ⁵₆

⁵₆ of the remainder = 50 - 5 = 45
¹₆ of the remainder = 45 ÷ 5 = 9
⁶₆ of the remainder = 6 x 9 = 54

1 - ¹₃ = ²₃
²₃ of the total = 54 + 64 = 118
¹₃ of the total = 118 ÷ 2 = 59
³₃ of the total = 3 x 59 = 177

Number of stickers at first = 177

Answer(s): 177