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