PSLE Charlie spent
13 of his money to buy 3 identical notebooks. He spent the rest of his money to buy another 5 such notebooks and 2 identical staplers.
- What fraction of Charlie's money was spent to buy the 2 staplers? Give your answer in the simplest form.
- For every 3 staplers bought, 1 additional stapler was given free. How many staplers would Charlie get in total if he were to spend all his money to buy staplers only?
(a)
Cost of 3 notebooks =
13 of his money
Cost of 1 notebook
=
13 ÷ 3
=
13 x
13 =
19 of his money
Fraction of Charlie's money spent to buy the 5 notebooks and 2 staplers
= 1 -
13 =
23 Cost of 5 notebooks
= 5 x
19 =
59 of his money
Fraction of Charlie's money spent to buy the 2 staplers
=
23 -
59 =
69 -
59 =
19 (b)
19 of Charlie's money = 2 staplers
99 of Charlie's money = 9 x 2 = 18 staplers
Number of free staplers
= 18 ÷ 3
= 3 r 3
Total number of staplers that Charlie would get
= 18 + 3
= 21
Answer(s): (a)
19; (b) 21