Adam spends ¹₂₁ of his money on some beads.
He spends ³₇ of his money on some stickers and
²₃ of the remaining money on some marbles.
In the end, he has $22 left.

1. How much does he spend on the beads?
2. How much does he spend on the stickers?
3. How much does he spend on the marbles?
4. How much does he spend altogether?

(a)
Amount left after Adam spends on beads and stickers
= 1 - ¹₂₁ - ³₇
= 1 - ¹₂₁ - ⁹₂₁
= ¹¹₂₁

Make the numerators the same.
¹¹₂₁ of the amount = ³₃ of the remaining amount
³³₆₃ of the amount = ³³₃₃ of the remaining amount

Amount that Adam spends on beads = ¹₂₁ = ³₆₃ 
Amount that Adam spends on stickers = ³₇ = ²⁷₆₃

Amount that Adam spends on marbles
= ²₃ x 33 u
= 22 u 

Amount that he has left
= 33 u - 22 u
= 11 u

11 u = 22

1 u = 22 ÷ 11 = 2

Amount that he spends on the beads
= 3 u
= 3 x 2
= $6

(b)
Amount that he spends on the stickers
= 27 u
= 27 x 2
= $54

(c)
Amount that he spends on the marbles
= 22 u
= 22 x 2
= $44

(d)
Amount that he spends altogether
= 6 + 54 + 44
= $104

Answer(s): (a) $6; (b) $54; (c) $44; (d) $104