PSLE Mark used
47 of his money to buy 12 files. He used the rest of his money to buy 8 files and 5 pens.
- What fraction of his money did Mark use to buy the 5 pens?
- If 1 pen was given for free for every 6 pens bought, how many pens would Mark be able to buy if he were to use all his money to buy pens?
(a)
Fraction of his money used to buy 8 files and 5 pens
= 1 -
47 =
37 12 files →
47 of his money
1 pen →
47 ÷ 12 =
121 of his money
8 files → 8 x
121 =
821 of his money
8 files + 5 pens →
37 of his money
5 pens →
37 -
821 =
921 -
821 =
121 of his money
(b)
5 pens →
1211 pen →
121 ÷ 5 =
1105 of his money
If 1 pen cost
1105 of his money, Mark could buy 105 pens (Not including the free ones).
Number of free pens that Mark could get
= 105 ÷ 6
= 17 r 3
Total number of pens that Mark could get
= 105 + 17
= 122
Answer(s): (a)
121; (b) 122