Roshel has 2 times as many pencils as Shiyun. Shiyun has
67 as many pencils as Olivia. If the three of them have a total of 75 pencils, how many pencils does Olivia have?
| Roshel |
Shiyun |
Olivia |
| 2x6 |
1x6 |
|
| |
6x1 |
7x1 |
| 12 u |
6 u |
7 u |
The number of pencils that Shiyun has is repeated. Make the number of pencils that Shiyun has the same. LCM of 1 and 6 is 6.
Total number of pencils that the three of them have
= 12 u + 6 u + 7 u
= 25 u
25 u = 75
1 u = 75 ÷ 25 = 3
Number of pencils that Olivia has
= 7 u
= 7 x 3
= 21
Answer(s): 21
