1 bead costs $7.
For every 10 beads bought, a discount of $6 is given.
- How much do 10 beads cost?
- How much do 16 beads cost?
- How much do 33 beads cost?
(a)
Cost of every 10 beads
= 10 x 7 - 6
= 70 - 6
= $64
(b)
Number of beads that do not belong to a set
= 16 ÷ 10
= 1 r 6
Cost of the 6 extra beads
= 6 x 7
= $42
Cost of 16 beads
= 64 + 42
= $106
(c)
Number of sets of 10 beads
= 33 ÷ 10
= 3 r 3
Cost of 30 beads
= 3 x 64
= $192
Cost of 3 beads
= 3 x 7
= $21
Cost of 33 beads
= 192 + 21
= $213
Answer(s): (a) $64; (b) $106; (c) $213