1 bead costs $8.
For every 10 beads bought, a discount of $7 is given.
- How much do 10 beads cost?
- How much do 14 beads cost?
- How much do 27 beads cost?
(a)
Cost of every 10 beads
= 10 x 8 - 7
= 80 - 7
= $73
(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
= 73 + 32
= $105
(c)
Number of sets of 10 beads
= 27 ÷ 10
= 2 r 7
Cost of 20 beads
= 2 x 73
= $146
Cost of 7 beads
= 7 x 8
= $56
Cost of 27 beads
= 146 + 56
= $202
Answer(s): (a) $73; (b) $105; (c) $202