PSLE Zeph spent
49 of his money to buy 5 identical staplers. He spent the rest of his money to buy another 6 such staplers and 4 identical pens.
- What fraction of Zeph's money was spent to buy the 4 pens? Give your answer in the simplest form.
- For every 6 pens bought, 1 additional pen was given free. How many pens would Zeph get in total if he were to spend all his money to buy pens only?
(a)
Cost of 5 staplers =
49 of his money
Cost of 1 stapler
=
49 ÷ 5
=
49 x
15 =
445 of his money
Cost of 6 staplers
= 6 x
445 =
2445 of his money
Fraction of Zeph's money spent to buy the 6 staplers and 2 pens
= 1 -
49 =
59 Fraction of Zeph's money spent to buy the 4 pens
=
59 -
2445 =
2545 -
2445 =
145 (b)
145 of Zeph's money = 4 pens
4545 of Zeph's money = 45 x 4 = 180 pens
Number of free pens
= 180 ÷ 6
= 30 r 0
Total number of pens that Zeph would get
= 180 + 30
= 210
Answer(s): (a)
145; (b) 210