PSLEMarion made some puffs to sell.
34 of them were sardine puffs and the rest were lotus paste puffs. After selling 340 lotus paste puffs and
56 of the sardine puffs, she had
16 of the puffs left. How many puffs did Marion sell?
|
Sardine puffs |
Lotus paste puffs |
Total |
Comparing sardine puffs and lotus paste puffs at first |
3x2 |
1x2 |
4x2
|
Before |
6x1 |
|
|
Change |
- 5x1
|
- 340 |
|
After |
1x1
|
|
|
|
Sardine puffs |
Lotus paste puffs |
Total |
Before |
6 u |
2 u |
8 u
|
Change |
- 5 u
|
- 340 |
|
After
|
1 u
|
2 u - 340
|
16 x 8 u = 113 u |
The number of sardine puffs at first is repeated. Make the number of sardine puffs at first the same. LCM of 3 and 6 is 6.
Number of puffs left
= 1 u + 2 u - 340
= 3 u - 340
3 u - 340 = 1
13 u
3 u - 1
13 u = 340
1
23 u = 340
1 u = 340 ÷ 1
23 = 204
Total number of puffs that Marion sold
= 5 u + 340
= 5 x 204 + 340
= 1020 + 340
= 1360
Answer(s): 1360