At a store, foolscaps are sold at $6 for 1 foolscap. For every 6 foolscaps a customer pays, an extra foolscap will be given free.
- How much will Mrs Kong pay for 13 foolscaps?
- What is the most number of foolscaps Mr Kok can get for $125?
(a)
Number of foolscaps in one set
= 6 + 1
= 7
Cost of a set of 7 foolscaps
= 6 x 6
= $36
Number of sets
= 13 ÷ 7
= 1 r 6
Amount that Mrs Kong paid
= 1 x 36 + 6 x 6
= 36 + 36
= $72
(b)
Maximum number of sets
= 125 ÷ 36
= 3 r 13
Number of foolscaps that can be bought with remaining money
= 13 ÷ 6
= 3
Maximum number of foolscaps
= 7 x 3 + 3
= 24
Answer(s): (a) $72; (b) 24