PSLEIrene made some croissants to sell.
34 of them were curry croissants and the rest were lotus paste croissants. After selling 330 lotus paste croissants and
56 of the curry croissants, she had
16 of the croissants left. How many croissants did Irene sell?
|
Curry croissants |
Lotus paste croissants |
Total |
Comparing curry croissants and lotus paste croissants at first |
3x2 |
1x2 |
4x2
|
Before |
6x1 |
|
|
Change |
- 5x1
|
- 330 |
|
After |
1x1
|
|
|
|
Curry croissants |
Lotus paste croissants |
Total |
Before |
6 u |
2 u |
8 u
|
Change |
- 5 u
|
- 330 |
|
After
|
1 u
|
2 u - 330
|
16 x 8 u = 113 u |
The number of curry croissants at first is repeated. Make the number of curry croissants at first the same. LCM of 3 and 6 is 6.
Number of croissants left
= 1 u + 2 u - 330
= 3 u - 330
3 u - 330 = 1
13 u
3 u - 1
13 u = 330
1
23 u = 330
1 u = 330 ÷ 1
23 = 198
Total number of croissants that Irene sold
= 5 u + 330
= 5 x 198 + 330
= 990 + 330
= 1320
Answer(s): 1320