Adam pays $12 for 2 stickers and 3 beads.
2 stickers cost as much as 3 beads.
- How much is 1 sticker?
- How much is 1 bead?
- How much is 4 beads and 5 stickers?
(a)
LCM of 2 and 3 = 6
Cost of 2 stickers = 6 u
Cost of 1 sticker = 6 u ÷ 2 = 3 u
Cost of 3 beads = 6 u
Cost of 1 bead = 6 u ÷ 3 = 2 u
Cost of 2 stickers = 2 x 3 u = 6 u
Cost of 3 beads = 3 x 2 u = 6 u
Total cost of 2 stickers and 3 beads
= 6 u + 6 u
= 12 u
12 u = 12
1 u = 12 ÷ 12 = 1
Cost of 1 sticker
= 3 u
= 3 x 1
= $3
(b)
Cost of 1 bead
= 2 u
= 2 x 1
= $2
(c)
Cost of 4 beads and 5 stickers
= 4 x 2 u + 5 x 3 u
= 8 u + 15 u
= 23 u
= 23 x 1
= $23
Answer(s): (a) $3; (b) $2; (c) $23