PSLE Pierre spent
25 of his money to buy 3 identical pencils. He spent the rest of his money to buy another 4 such pencils and 2 identical markers.
- What fraction of Pierre's money was spent to buy the 2 markers? Give your answer in the simplest form.
- For every 5 markers bought, 1 additional marker was given free. How many markers would Pierre get in total if he were to spend all his money to buy markers only?
(a)
Cost of 3 pencils =
25 of his money
Cost of 1 pencil
=
25 ÷ 3
=
25 x
13 =
215 of his money
Fraction of Pierre's money spent to buy the 4 pencils and 2 markers
= 1 -
25 =
35 Cost of 4 pencils
= 4 x
215 =
815 of his money
Fraction of Pierre's money spent to buy the 2 markers
=
35 -
815 =
915 -
815 =
115 (b)
115 of Pierre's money = 2 markers
1515 of Pierre's money = 15 x 2 = 30 markers
Number of free markers
= 30 ÷ 5
= 7 r 2
Total number of markers that Pierre would get
= 30 + 7
= 37
Answer(s): (a)
115; (b) 37