PSLE Andy spent
37 of his money to buy 4 identical pens. He spent the rest of his money to buy another 5 such pens and 4 identical notebooks.
- What fraction of Andy's money was spent to buy the 4 notebooks? Give your answer in the simplest form.
- For every 5 notebooks bought, 1 additional notebook was given free. How many notebooks would Andy get in total if he were to spend all his money to buy notebooks 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 Andy's money spent to buy the 5 pens and 2 notebooks
= 1 -
37 =
47 Cost of 5 pens
= 5 x
328 =
1528 of his money
Fraction of Andy's money spent to buy the 4 notebooks
=
47 -
1528 =
1628 -
1528 =
128 (b)
128 of Andy's money = 4 notebooks
2828 of Andy's money = 28 x 4 = 112 notebooks
Number of free notebooks
= 112 ÷ 5
= 22 r 2
Total number of notebooks that Andy would get
= 112 + 22
= 134
Answer(s): (a)
128; (b) 134