Ivan had some pastries.
58 of them were biscuits. The rest were cupcakes. He sold
56 of the biscuits and 20 cupcakes. In the end, he had 141 pastries left. How many more biscuits than cupcakes did he sell?
| |
Biscuits |
Cupcakes |
Comparing pastries
at first |
5x6 =
30 u |
3x6 =
18 u |
Before
|
6x5 =
30 u |
18 u |
Change
|
- 5x5 =
- 25 u |
- 20 |
After
|
1x5 =
5 u |
18 u - 20 |
The number of biscuits at first is repeated. Make the number of biscuits at first the same. LCM of 5 and 6 is 30.
Total number of pastries left
= 5 u + 18 u - 20
= 23 u - 20
23 u - 20 = 141
23 u = 141 + 20
23 u = 161
1 u = 161 ÷ 23 = 7
Number of more biscuits than cupcakes that Ivan sold
= 25 u - 20
= 25 x 7 - 20
= 175 - 20
= 155
Answer(s): 155
