Adam pays $16 for 4 beads and 2 stickers.
2 beads cost as much as 3 stickers.
- How much is 1 bead?
- How much is 1 sticker?
- How much is 3 stickers and 5 beads?
(a)
LCM of 2 and 3 = 6
Cost of 2 beads = 6 u
Cost of 1 bead = 6 u ÷ 2 = 3 u
Cost of 3 stickers = 6 u
Cost of 1 sticker = 6 u ÷ 3 = 2 u
Cost of 4 beads = 4 x 3 u = 12 u
Cost of 2 stickers = 2 x 2 u = 4 u
Total cost of 4 beads and 2 stickers
= 12 u + 4 u
= 16 u
16 u = 16
1 u = 16 ÷ 16 = 1
Cost of 1 bead
= 3 u
= 3 x 1
= $3
(b)
Cost of 1 sticker
= 2 u
= 2 x 1
= $2
(c)
Cost of 3 stickers and 5 beads
= 3 x 2 u + 5 x 3 u
= 6 u + 15 u
= 21 u
= 21 x 1
= $21
Answer(s): (a) $3; (b) $2; (c) $21