Oscar had some pastries.
38 of them were wafers. The rest were tarts. He sold
25 of the wafers and 15 tarts. In the end, he had 257 pastries left. How many more wafers than tarts did he sell?
| |
Wafers |
Tarts |
Comparing pastries
at first |
3x5 =
15 u |
5x5 =
25 u |
Before
|
5x3 =
15 u |
25 u |
Change
|
- 2x3 =
- 6 u |
- 15 |
After
|
3x3 =
9 u |
25 u - 15 |
The number of wafers at first is repeated. Make the number of wafers at first the same. LCM of 3 and 5 is 15.
Total number of pastries left
= 9 u + 25 u - 15
= 34 u - 15
34 u - 15 = 257
34 u = 257 + 15
34 u = 272
1 u = 272 ÷ 34 = 8
Number of more wafers than tarts that Oscar sold
= 6 u - 15
= 6 x 8 - 15
= 48 - 15
= 33
Answer(s): 33
