PSLE Justin used
23 of his money to buy 6 files. He used the rest of his money to buy 2 files and 4 pens.
- What fraction of his money did Justin use to buy the 4 pens?
- If 1 pen was given for free for every 5 pens bought, how many pens would Justin be able to buy if he were to use all his money to buy pens?
(a)
Fraction of his money used to buy 2 files and 4 pens
= 1 -
23 =
13 6 files →
23 of his money
1 pen →
23 ÷ 6 =
19 of his money
2 files → 2 x
19 =
29 of his money
2 files + 4 pens →
13 of his money
4 pens →
13 -
29 =
39 -
29 =
19 of his money
(b)
4 pens →
191 pen →
19 ÷ 4 =
136 of his money
If 1 pen cost
136 of his money, Justin could buy 36 pens (Not including the free ones).
Number of free pens that Justin could get
= 36 ÷ 5
= 7 r 1
Total number of pens that Justin could get
= 36 + 7
= 43
Answer(s): (a)
19; (b) 43