PSLE Bobby spent
37 of his money to buy 4 identical notebooks. He spent the rest of his money to buy another 5 such notebooks 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 5 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 4 notebooks =
37 of his money
Cost of 1 notebook
=
37 ÷ 4
=
37 x
14 =
328 of his money
Cost of 5 notebooks
= 5 x
328 =
1528 of his money
Fraction of Bobby's money spent to buy the 5 notebooks and 2 markers
= 1 -
37 =
47 Fraction of Bobby's money spent to buy the 4 markers
=
47 -
1528 =
1628 -
1528 =
128 (b)
128 of Bobby's money = 4 markers
2828 of Bobby's money = 28 x 4 = 112 markers
Number of free markers
= 112 ÷ 5
= 22 r 2
Total number of markers that Bobby would get
= 112 + 22
= 134
Answer(s): (a)
128; (b) 134