At a stationery kiosk, punchers are sold at $6 for 1 puncher. For every 6 punchers a customer pays, an extra puncher will be given free.
- How much will Mrs Seah pay for 19 punchers?
- What is the most number of punchers Mr Hun can get for $140?
(a)
Number of punchers in one set
= 6 + 1
= 7
Cost of a set of 7 punchers
= 6 x 6
= $36
Number of sets
= 19 ÷ 7
= 2 r 5
Amount that Mrs Seah paid
= 2 x 36 + 5 x 6
= 72 + 30
= $102
(b)
Maximum number of sets
= 140 ÷ 36
= 3 r 19
Number of punchers that can be bought with remaining money
= 19 ÷ 6
= 3
Maximum number of punchers
= 7 x 3 + 3
= 24
Answer(s): (a) $102; (b) 24