PSLEKathy made some buns to sell.
34 of them were kaya buns and the rest were chicken buns. After selling 155 chicken buns and
56 of the kaya buns, she had
16 of the buns left. How many buns did Kathy sell?
|
Kaya buns |
Chicken buns |
Total |
Comparing kaya buns and chicken buns at first |
3x2 |
1x2 |
4x2
|
Before |
6x1 |
|
|
Change |
- 5x1
|
- 155 |
|
After |
1x1
|
|
|
|
Kaya buns |
Chicken buns |
Total |
Before |
6 u |
2 u |
8 u
|
Change |
- 5 u
|
- 155 |
|
After
|
1 u
|
2 u - 155
|
16 x 8 u = 113 u |
The number of kaya buns at first is repeated. Make the number of kaya buns at first the same. LCM of 3 and 6 is 6.
Number of buns left
= 1 u + 2 u - 155
= 3 u - 155
3 u - 155 = 1
13 u
3 u - 1
13 u = 155
1
23 u = 155
1 u = 155 ÷ 1
23 = 93
Total number of buns that Kathy sold
= 5 u + 155
= 5 x 93 + 155
= 465 + 155
= 620
Answer(s): 620