PSLE Charlie spent
13 of his money to buy 3 identical markers. He spent the rest of his money to buy another 5 such markers and 3 identical files.
- What fraction of Charlie's money was spent to buy the 3 files? Give your answer in the simplest form.
- For every 5 files bought, 1 additional file was given free. How many files would Charlie get in total if he were to spend all his money to buy files only?
(a)
Cost of 3 markers =
13 of his money
Cost of 1 marker
=
13 ÷ 3
=
13 x
13 =
19 of his money
Fraction of Charlie's money spent to buy the 5 markers and 2 files
= 1 -
13 =
23 Cost of 5 markers
= 5 x
19 =
59 of his money
Fraction of Charlie's money spent to buy the 3 files
=
23 -
59 =
69 -
59 =
19 (b)
19 of Charlie's money = 3 files
99 of Charlie's money = 9 x 3 = 27 files
Number of free files
= 27 ÷ 5
= 5 r 2
Total number of files that Charlie would get
= 27 + 5
= 32
Answer(s): (a)
19; (b) 32