Riordan had 161 apples and 108 lemons at first. He used
57 of the apples and
34 of the lemons. He then bought some more lemons. In the end,
12 of the fruits he had left were apples. How many lemons did he buy?
| |
Apples |
Lemons |
Total |
| Before |
161 |
108 |
|
| Change 1 |
- 115 |
- 81 |
|
| After 1 |
46 |
27 |
|
| Change 2 |
|
+ some |
|
| After 2 |
1 u |
1 u |
2 u |
Number of apples that Riordan used
=
57 x 161
= 115
Number of apples that Riordan had left
= 161 - 115
= 46
Number of lemons that Riordan used
=
34 x 108
= 81
Number of lemons that Riordan had left
= 108 - 81
= 27
Fraction of the fruits left that were lemons
= 1 -
12=
12 Number of apples left = 1 u = 46
Number of lemons left in the end
= 1 u
= 1 x 46
= 46
Number of lemons that Riordan bought
= 46 - 27
= 19
Answer(s): 19
