Rael had some pastries.
35 of them were wafers. The rest were scones. He sold
35 of the wafers and 17 scones. In the end, he had 31 pastries left. How many more wafers than scones did he sell?
| |
Wafers |
Scones |
Comparing pastries
at first |
3x5 =
15 u |
2x5 =
10 u |
Before
|
5x3 =
15 u |
10 u |
Change
|
- 3x3 =
- 9 u |
- 17 |
After
|
2x3 =
6 u |
10 u - 17 |
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
= 6 u + 10 u - 17
= 16 u - 17
16 u - 17 = 31
16 u = 31 + 17
16 u = 48
1 u = 48 ÷ 16 = 3
Number of more wafers than scones that Rael sold
= 9 u - 17
= 9 x 3 - 17
= 27 - 17
= 10
Answer(s): 10
