At a stationery shop, foolscaps are sold at $8 for 1 foolscap. For every 7 foolscaps a customer pays, an extra foolscap will be given free.
- How much will Mrs Ng pay for 18 foolscaps?
- What is the most number of foolscaps Mr Chan can get for $118?
(a)
Number of foolscaps in one set
= 7 + 1
= 8
Cost of a set of 8 foolscaps
= 7 x 8
= $56
Number of sets
= 18 ÷ 8
= 2 r 2
Amount that Mrs Ng paid
= 2 x 56 + 2 x 8
= 112 + 16
= $128
(b)
Maximum number of sets
= 118 ÷ 56
= 2 r 18
Number of foolscaps that can be bought with remaining money
= 18 ÷ 8
= 2
Maximum number of foolscaps
= 8 x 2 + 2
= 18
Answer(s): (a) $128; (b) 18