Adam has some stickers
He gives away ¹₅ and an additional 95 stickers to Bryan.
He gives away ³₅ of the remainder and 15 more stickers to Chris
and ³₇ 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 = ¹₅ of the total + 95
Number of stickers that Adam gives to Chris = ³₅ of the remainder + 15
Number of stickers that Adam gives to David = ³₇ of the rest
Number of stickers left = 20


Working backwards.
1 - ³₇ = ⁴₇

⁴₇ of the rest → 20
¹₇ of the rest → 20 ÷ 4 = 5
⁷₇ of the rest → 7 x 5 = 35

1 - ³₅ = ²₅

²₅ of the remainder = 15 + 35 = 50
¹₅ of the remainder = 50 ÷ 2 = 25
⁵₅ of the remainder = 5 x 25 = 125

1 - ¹₅ = ⁴₅
⁴₅ of the total = 125 + 95 = 220
¹₅ of the total = 220 ÷ 4 = 55
⁵₅ of the total = 5 x 55 = 275

Number of stickers at first = 275

Answer(s): 275