1 bead costs $4.
For every 10 beads bought, a discount of $3 is given.
- How much do 10 beads cost?
- How much do 14 beads cost?
- How much do 25 beads cost?
(a)
Cost of every 10 beads
= 10 x 4 - 3
= 40 - 3
= $37
(b)
Number of beads that do not belong to a set
= 14 ÷ 10
= 1 r 4
Cost of the 4 extra beads
= 4 x 4
= $16
Cost of 14 beads
= 37 + 16
= $53
(c)
Number of sets of 10 beads
= 25 ÷ 10
= 2 r 5
Cost of 20 beads
= 2 x 37
= $74
Cost of 5 beads
= 5 x 4
= $20
Cost of 25 beads
= 74 + 20
= $94
Answer(s): (a) $37; (b) $53; (c) $94