At a stationery shop, markers are sold at $8 for 1 marker. For every 6 markers a customer pays, an extra marker will be given free.
- How much will Mrs Tang pay for 12 markers?
- What is the most number of markers Mr Loh can get for $135?
(a)
Number of markers in one set
= 6 + 1
= 7
Cost of a set of 7 markers
= 6 x 8
= $48
Number of sets
= 12 ÷ 7
= 1 r 5
Amount that Mrs Tang paid
= 1 x 48 + 5 x 8
= 48 + 40
= $88
(b)
Maximum number of sets
= 135 ÷ 48
= 2 r 12
Number of markers that can be bought with remaining money
= 12 ÷ 8
= 2
Maximum number of markers
= 7 x 2 + 2
= 16
Answer(s): (a) $88; (b) 16