Risa has 5 times as many cookies as Shiyun. The total number of Risa's and Shiyun's cookies is 5 times of Anna's. Risa and Shiyun have 264 cookies more than Anna's. How many less cookies does Anna have than Risa?
| Risa |
Shiyun |
Anna |
| 5x5 |
1x5 |
|
| 5x6 |
1x6 |
| 25 u |
5 u |
6 u |
The total number of cookies that Risa and Shiyun have is repeated. Make the total number of cookies that Risa and Shiyun have the same. LCM of 6 and 5 is 30.
Total number of cookies that Risa and Shiyun have
= 25 u + 5 u
= 30 u
Number of more cookies that Risa and Shiyun have than Anna
= 30 u - 6 u
= 24 u
24 u = 264
1 u = 264 ÷ 24 = 11
Number of less cookies that Anna has than Risa
= 25 u - 6 u
= 19 u
= 19 x 11
= 209
Answer(s): 209
