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