Zane had some pastries.
27 of them were tarts. The rest were scones. He sold
25 of the tarts and 2 scones. In the end, he had 153 pastries left. How many pastries did he sell?
| |
Tarts |
Scones |
Comparing pastries
at first |
2x5 =
10 u |
5x5 =
25 u |
Before
|
5x2 =
10 u |
25 u |
Change
|
- 2x2 =
- 4 u |
- 2 |
After
|
3x2 =
6 u |
25 u - 2 |
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
= 6 u + 25 u - 2
= 31 u - 2
31 u - 2 = 153
31 u = 153 + 2
31 u = 155
1 u = 155 ÷ 31 = 5
Number of pastries that Zane sold
= 4 u + 2
= 4 x 5 + 2
= 20 + 2
= 22
Answer(s): 22
