1 bead costs $3.
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 26 beads cost?
(a)
Cost of every 10 beads
= 10 x 3 - 6
= 30 - 6
= $24
(b)
Number of beads that do not belong to a set
= 16 ÷ 10
= 1 r 6
Cost of the 6 extra beads
= 6 x 3
= $18
Cost of 16 beads
= 24 + 18
= $42
(c)
Number of sets of 10 beads
= 26 ÷ 10
= 2 r 6
Cost of 20 beads
= 2 x 24
= $48
Cost of 6 beads
= 6 x 3
= $18
Cost of 26 beads
= 48 + 18
= $66
Answer(s): (a) $24; (b) $42; (c) $66