PSLECathy made some puffs to sell.
34 of them were lotus paste puffs and the rest were curry puffs. After selling 230 curry puffs and
56 of the lotus paste puffs, she had
16 of the puffs left. How many puffs did Cathy sell?
|
Lotus paste puffs |
Curry puffs |
Total |
Comparing lotus paste puffs and curry puffs at first |
3x2 |
1x2 |
4x2
|
Before |
6x1 |
|
|
Change |
- 5x1
|
- 230 |
|
After |
1x1
|
|
|
|
Lotus paste puffs |
Curry puffs |
Total |
Before |
6 u |
2 u |
8 u
|
Change |
- 5 u
|
- 230 |
|
After
|
1 u
|
2 u - 230
|
16 x 8 u = 113 u |
The number of lotus paste puffs at first is repeated. Make the number of lotus paste puffs at first the same. LCM of 3 and 6 is 6.
Number of puffs left
= 1 u + 2 u - 230
= 3 u - 230
3 u - 230 = 1
13 u
3 u - 1
13 u = 230
1
23 u = 230
1 u = 230 ÷ 1
23 = 138
Total number of puffs that Cathy sold
= 5 u + 230
= 5 x 138 + 230
= 690 + 230
= 920
Answer(s): 920