Riordan had some pastries.
47 of them were biscuits. The rest were scones. He sold
56 of the biscuits and 16 scones. In the end, he had 83 pastries left. How many more biscuits than scones did he sell?
| |
Biscuits |
Scones |
Comparing pastries
at first |
4x3 =
12 u |
3x3 =
9 u |
Before
|
6x2 =
12 u |
9 u |
Change
|
- 5x2 =
- 10 u |
- 16 |
After
|
1x2 =
2 u |
9 u - 16 |
The number of biscuits at first is repeated. Make the number of biscuits at first the same. LCM of 4 and 6 is 12.
Total number of pastries left
= 2 u + 9 u - 16
= 11 u - 16
11 u - 16 = 83
11 u = 83 + 16
11 u = 99
1 u = 99 ÷ 11 = 9
Number of more biscuits than scones that Riordan sold
= 10 u - 16
= 10 x 9 - 16
= 90 - 16
= 74
Answer(s): 74
