Four hours ago, a store owner started his day with some chikoos and oranges in the ratio of 5 : 3. There were 150 oranges. Some of the chikoos were bought by Cindy. As a result, the number of chikoos became
25 of the oranges.
- How many chikoos did the store owner have left?
- How many chikoos did the store owner have to buy in order to have an equal number of chikoos and oranges?
|
Chikoos |
Oranges |
Before |
5x5 = 25 u |
3x5 = 15 u |
Change |
- ? |
|
After |
2x3 = 6 u |
5x3 = 15 u |
(a)
The number of oranges remains unchanged. Make the number of oranges the same. LCM of 3 and 5 is 15.
15 u = 150
1 u = 150 ÷ 15 = 10
Number of chikoos that the store owner had left
= 6 u
= 6 x 10
= 60
(b)
Number of chikoos that the store owner had to buy to have an equal number of chikoos and oranges
= 15 u - 6 u
= 9 u
= 9 x 10
= 90
Answer(s): (a) 60; (b) 90