At a stationery kiosk, markers are sold at $5 for 1 marker. For every 8 markers a customer pays, an extra marker will be given free.
- How much will Mrs Lau pay for 19 markers?
- What is the most number of markers Mr Song can get for $95?
(a)
Number of markers in one set
= 8 + 1
= 9
Cost of a set of 9 markers
= 8 x 5
= $40
Number of sets
= 19 ÷ 9
= 2 r 1
Amount that Mrs Lau paid
= 2 x 40 + 1 x 5
= 80 + 5
= $85
(b)
Maximum number of sets
= 95 ÷ 40
= 2 r 19
Number of markers that can be bought with remaining money
= 19 ÷ 5
= 2
Maximum number of markers
= 9 x 2 + 2
= 20
Answer(s): (a) $85; (b) 20