Adam pays $20 for 5 stickers and 2 beads.
5 stickers cost as much as 2 beads.
- How much is 1 sticker?
- How much is 1 bead?
- How much is 5 beads and 2 stickers?
(a)
LCM of 5 and 2 = 10
Cost of 5 stickers = 10 u
Cost of 1 sticker = 10 u ÷ 5 = 2 u
Cost of 2 beads = 10 u
Cost of 1 bead = 10 u ÷ 2 = 5 u
Cost of 5 stickers = 5 x 2 u = 10 u
Cost of 2 beads = 2 x 5 u = 10 u
Total cost of 5 stickers and 2 beads
= 10 u + 10 u
= 20 u
20 u = 20
1 u = 20 ÷ 20 = 1
Cost of 1 sticker
= 2 u
= 2 x 1
= $2
(b)
Cost of 1 bead
= 5 u
= 5 x 1
= $5
(c)
Cost of 5 beads and 2 stickers
= 5 x 5 u + 2 x 2 u
= 25 u + 4 u
= 29 u
= 29 x 1
= $29
Answer(s): (a) $2; (b) $5; (c) $29