PSLE Pierre used
23 of his money to buy 6 pencils. He used the rest of his money to buy 2 pencils and 5 pens.
- What fraction of his money did Pierre use to buy the 5 pens?
- If 1 pen was given for free for every 6 pens bought, how many pens would Pierre be able to buy if he were to use all his money to buy pens?
(a)
Fraction of his money used to buy 2 pencils and 5 pens
= 1 -
23 =
13 6 pencils →
23 of his money
1 pen →
23 ÷ 6 =
19 of his money
2 pencils → 2 x
19 =
29 of his money
2 pencils + 5 pens →
13 of his money
5 pens →
13 -
29 =
39 -
29 =
19 of his money
(b)
5 pens →
191 pen →
19 ÷ 5 =
145 of his money
If 1 pen cost
145 of his money, Pierre could buy 45 pens (Not including the free ones).
Number of free pens that Pierre could get
= 45 ÷ 6
= 7 r 3
Total number of pens that Pierre could get
= 45 + 7
= 52
Answer(s): (a)
19; (b) 52