At a stationery shop, glues are sold at $6 for 1 glue. For every 7 glues a customer pays, an extra glue will be given free.
- How much will Mrs Ang pay for 19 glues?
- What is the most number of glues Mr Chye can get for $140?
(a)
Number of glues in one set
= 7 + 1
= 8
Cost of a set of 8 glues
= 7 x 6
= $42
Number of sets
= 19 ÷ 8
= 2 r 3
Amount that Mrs Ang paid
= 2 x 42 + 3 x 6
= 84 + 18
= $102
(b)
Maximum number of sets
= 140 ÷ 42
= 3 r 19
Number of glues that can be bought with remaining money
= 19 ÷ 6
= 3
Maximum number of glues
= 8 x 3 + 3
= 27
Answer(s): (a) $102; (b) 27