PSLE Harry spent
13 of his money to buy 3 identical pencils. He spent the rest of his money to buy another 5 such pencils and 4 identical staplers.
- What fraction of Harry's money was spent to buy the 4 staplers? Give your answer in the simplest form.
- For every 4 staplers bought, 1 additional stapler was given free. How many staplers would Harry get in total if he were to spend all his money to buy staplers only?
(a)
Cost of 3 pencils =
13 of his money
Cost of 1 pencil
=
13 ÷ 3
=
13 x
13 =
19 of his money
Cost of 5 pencils
= 5 x
19 =
59 of his money
Fraction of Harry's money spent to buy the 5 pencils and 2 staplers
= 1 -
13 =
23 Fraction of Harry's money spent to buy the 4 staplers
=
23 -
59 =
69 -
59 =
19 (b)
19 of Harry's money = 4 staplers
99 of Harry's money = 9 x 4 = 36 staplers
Number of free staplers
= 36 ÷ 4
= 7 r 1
Total number of staplers that Harry would get
= 36 + 7
= 43
Answer(s): (a)
19; (b) 43