1 bead costs $8.
For every 10 beads bought, a discount of $5 is given.
- How much do 10 beads cost?
- How much do 14 beads cost?
- How much do 23 beads cost?
(a)
Cost of every 10 beads
= 10 x 8 - 5
= 80 - 5
= $75
(b)
Number of beads that do not belong to a set
= 14 ÷ 10
= 1 r 4
Cost of the 4 extra beads
= 4 x 8
= $32
Cost of 14 beads
= 75 + 32
= $107
(c)
Number of sets of 10 beads
= 23 ÷ 10
= 2 r 3
Cost of 20 beads
= 2 x 75
= $150
Cost of 3 beads
= 3 x 8
= $24
Cost of 23 beads
= 150 + 24
= $174
Answer(s): (a) $75; (b) $107; (c) $174