PSLE George spent
25 of his money to buy 3 identical files. He spent the rest of his money to buy another 4 such files and 4 identical pens.
- What fraction of George's money was spent to buy the 4 pens? Give your answer in the simplest form.
- For every 3 pens bought, 1 additional pen was given free. How many pens would George get in total if he were to spend all his money to buy pens only?
(a)
Cost of 3 files =
25 of his money
Cost of 1 file
=
25 ÷ 3
=
25 x
13 =
215 of his money
Cost of 4 files
= 4 x
215 =
815 of his money
Fraction of George's money spent to buy the 4 files and 2 pens
= 1 -
25 =
35 Fraction of George's money spent to buy the 4 pens
=
35 -
815 =
915 -
815 =
115 (b)
115 of George's money = 4 pens
1515 of George's money = 15 x 4 = 60 pens
Number of free pens
= 60 ÷ 3
= 15 r 0
Total number of pens that George would get
= 60 + 15
= 75
Answer(s): (a)
115; (b) 75