At a stationery shop, pencils are sold at $9 for 1 pencil. For every 8 pencils a customer pays, an extra pencil will be given free.
- How much will Mrs Chye pay for 14 pencils?
- What is the most number of pencils Mr Cheong can get for $147?
(a)
Number of pencils in one set
= 8 + 1
= 9
Cost of a set of 9 pencils
= 8 x 9
= $72
Number of sets
= 14 ÷ 9
= 1 r 5
Amount that Mrs Chye paid
= 1 x 72 + 5 x 9
= 72 + 45
= $117
(b)
Maximum number of sets
= 147 ÷ 72
= 2 r 14
Number of pencils that can be bought with remaining money
= 14 ÷ 9
= 2
Maximum number of pencils
= 9 x 2 + 2
= 20
Answer(s): (a) $117; (b) 20