1 bead costs $8.
For every 10 beads bought, a discount of $6 is given.
- How much do 10 beads cost?
- How much do 19 beads cost?
- How much do 27 beads cost?
(a)
Cost of every 10 beads
= 10 x 8 - 6
= 80 - 6
= $74
(b)
Number of beads that do not belong to a set
= 19 ÷ 10
= 1 r 9
Cost of the 9 extra beads
= 9 x 8
= $72
Cost of 19 beads
= 74 + 72
= $146
(c)
Number of sets of 10 beads
= 27 ÷ 10
= 2 r 7
Cost of 20 beads
= 2 x 74
= $148
Cost of 7 beads
= 7 x 8
= $56
Cost of 27 beads
= 148 + 56
= $204
Answer(s): (a) $74; (b) $146; (c) $204