Harry had some pastries.
25 of them were tarts. The rest were macarons. He sold
35 of the tarts and 4 macarons. In the end, he had 110 pastries left. How many pastries did he sell?
| |
Tarts |
Macarons |
Comparing pastries
at first |
2x5 =
10 u |
3x5 =
15 u |
Before
|
5x2 =
10 u |
15 u |
Change
|
- 3x2 =
- 6 u |
- 4 |
After
|
2x2 =
4 u |
15 u - 4 |
The number of tarts at first is repeated. Make the number of tarts at first the same. LCM of 2 and 5 is 10.
Total number of pastries left
= 4 u + 15 u - 4
= 19 u - 4
19 u - 4 = 110
19 u = 110 + 4
19 u = 114
1 u = 114 ÷ 19 = 6
Number of pastries that Harry sold
= 6 u + 4
= 6 x 6 + 4
= 36 + 4
= 40
Answer(s): 40
