## Task 2 - 040722

In a 7th grade class, at the end of the last school year in mathematics, no student received the grade "5", every ninth student received the grade "1", every third received the grade "2", and every sixth received the grade "4".

The number of students $\mathrm{n}$ is known: $20<n<40$.

How many students received the grade "3"?
The number $n$ must be a multiple of 9, 6, and 3, i.e., a multiple of 18. Given $20<n<40$, only $n=36$ is possible.

| Grade | 1 | 2 | 3 | 4 |
| :--- | :---: | :---: | :---: | :---: |
| Students | 4 | 12 | 14 | 6 |

$x=14$ students have the grade 3.