PSLE Harry spent
25 of his money to buy 3 identical pens. He spent the rest of his money to buy another 4 such pens and 4 identical notebooks.
- What fraction of Harry's money was spent to buy the 4 notebooks? Give your answer in the simplest form.
- For every 6 notebooks bought, 1 additional notebook was given free. How many notebooks would Harry get in total if he were to spend all his money to buy notebooks only?
(a)
Cost of 3 pens =
25 of his money
Cost of 1 pen
=
25 ÷ 3
=
25 x
13 =
215 of his money
Fraction of Harry's money spent to buy the 4 pens and 2 notebooks
= 1 -
25 =
35 Cost of 4 pens
= 4 x
215 =
815 of his money
Fraction of Harry's money spent to buy the 4 notebooks
=
35 -
815 =
915 -
815 =
115 (b)
115 of Harry's money = 4 notebooks
1515 of Harry's money = 15 x 4 = 60 notebooks
Number of free notebooks
= 60 ÷ 6
= 15 r 0
Total number of notebooks that Harry would get
= 60 + 15
= 75
Answer(s): (a)
115; (b) 75