PSLE Owen spent
37 of his money to buy 4 identical pens. He spent the rest of his money to buy another 5 such pens and 2 identical staplers.
- What fraction of Owen's money was spent to buy the 2 staplers? Give your answer in the simplest form.
- For every 5 staplers bought, 1 additional stapler was given free. How many staplers would Owen get in total if he were to spend all his money to buy staplers only?
(a)
Cost of 4 pens =
37 of his money
Cost of 1 pen
=
37 ÷ 4
=
37 x
14 =
328 of his money
Fraction of Owen's money spent to buy the 5 pens and 2 staplers
= 1 -
37 =
47 Cost of 5 pens
= 5 x
328 =
1528 of his money
Fraction of Owen's money spent to buy the 2 staplers
=
47 -
1528 =
1628 -
1528 =
128 (b)
128 of Owen's money = 2 staplers
2828 of Owen's money = 28 x 2 = 56 staplers
Number of free staplers
= 56 ÷ 5
= 11 r 1
Total number of staplers that Owen would get
= 56 + 11
= 67
Answer(s): (a)
128; (b) 67