Five hours ago, a stallholder started his day with some apples and chikoos in the ratio of 8 : 3. There were 180 chikoos. Some of the apples were bought by Xuan. As a result, the number of apples became
25 of the chikoos.
- How many apples did the stallholder have left?
- How many apples did the stallholder have to buy in order to have an equal number of apples and chikoos?
|
Apples |
Chikoos |
Before |
8x5 = 40 u |
3x5 = 15 u |
Change |
- ? |
|
After |
2x3 = 6 u |
5x3 = 15 u |
(a)
The number of chikoos remains unchanged. Make the number of chikoos the same. LCM of 3 and 5 is 15.
15 u = 180
1 u = 180 ÷ 15 = 12
Number of apples that the stallholder had left
= 6 u
= 6 x 12
= 72
(b)
Number of apples that the stallholder had to buy to have an equal number of apples and chikoos
= 15 u - 6 u
= 9 u
= 9 x 12
= 108
Answer(s): (a) 72; (b) 108