At a stationery shop, folders are sold at $7 for 1 folder. For every 8 folders a customer pays, an extra folder will be given free.
- How much will Mrs Tan pay for 10 folders?
- What is the most number of folders Mr Tang can get for $118?
(a)
Number of folders in one set
= 8 + 1
= 9
Cost of a set of 9 folders
= 8 x 7
= $56
Number of sets
= 10 ÷ 9
= 1 r 1
Amount that Mrs Tan paid
= 1 x 56 + 1 x 7
= 56 + 7
= $63
(b)
Maximum number of sets
= 118 ÷ 56
= 2 r 10
Number of folders that can be bought with remaining money
= 10 ÷ 7
= 2
Maximum number of folders
= 9 x 2 + 2
= 20
Answer(s): (a) $63; (b) 20