At a book shop, correction tapes are sold at $5 for 1 correction tape. For every 6 correction tapes a customer pays, an extra correction tape will be given free.
- How much will Mrs Ong pay for 8 correction tapes?
- What is the most number of correction tapes Mr Gan can get for $99?
(a)
Number of correction tapes in one set
= 6 + 1
= 7
Cost of a set of 7 correction tapes
= 6 x 5
= $30
Number of sets
= 8 ÷ 7
= 1 r 1
Amount that Mrs Ong paid
= 1 x 30 + 1 x 5
= 30 + 5
= $35
(b)
Maximum number of sets
= 99 ÷ 30
= 3 r 8
Number of correction tapes that can be bought with remaining money
= 8 ÷ 5
= 3
Maximum number of correction tapes
= 7 x 3 + 3
= 24
Answer(s): (a) $35; (b) 24