At a bookstore, notebooks are sold at $6 for 1 notebook. For every 5 notebooks a customer pays, an extra notebook will be given free.
- How much will Mrs Seow pay for 8 notebooks?
- What is the most number of notebooks Mr Chia can get for $110?
(a)
Number of notebooks in one set
= 5 + 1
= 6
Cost of a set of 6 notebooks
= 5 x 6
= $30
Number of sets
= 8 ÷ 6
= 1 r 2
Amount that Mrs Seow paid
= 1 x 30 + 2 x 6
= 30 + 12
= $42
(b)
Maximum number of sets
= 110 ÷ 30
= 3 r 8
Number of notebooks that can be bought with remaining money
= 8 ÷ 6
= 3
Maximum number of notebooks
= 6 x 3 + 3
= 21
Answer(s): (a) $42; (b) 21