1 bead costs $6.
For every 10 beads bought, a discount of $7 is given.
- How much do 10 beads cost?
- How much do 12 beads cost?
- How much do 26 beads cost?
(a)
Cost of every 10 beads
= 10 x 6 - 7
= 60 - 7
= $53
(b)
Number of beads that do not belong to a set
= 12 ÷ 10
= 1 r 2
Cost of the 2 extra beads
= 2 x 6
= $12
Cost of 12 beads
= 53 + 12
= $65
(c)
Number of sets of 10 beads
= 26 ÷ 10
= 2 r 6
Cost of 20 beads
= 2 x 53
= $106
Cost of 6 beads
= 6 x 6
= $36
Cost of 26 beads
= 106 + 36
= $142
Answer(s): (a) $53; (b) $65; (c) $142