1 bead costs $4.
For every 10 beads bought, a discount of $6 is given.
- How much do 10 beads cost?
- How much do 13 beads cost?
- How much do 24 beads cost?
(a)
Cost of every 10 beads
= 10 x 4 - 6
= 40 - 6
= $34
(b)
Number of beads that do not belong to a set
= 13 ÷ 10
= 1 r 3
Cost of the 3 extra beads
= 3 x 4
= $12
Cost of 13 beads
= 34 + 12
= $46
(c)
Number of sets of 10 beads
= 24 ÷ 10
= 2 r 4
Cost of 20 beads
= 2 x 34
= $68
Cost of 4 beads
= 4 x 4
= $16
Cost of 24 beads
= 68 + 16
= $84
Answer(s): (a) $34; (b) $46; (c) $84