13. A set of 121 chairs needs to be arranged in
a square formation for a school assembly.
How many chairs should be lined up in each
row?
![13 A set of 121 chairs needs to be arranged in a square formation for a school assembly How many chairs should be lined up in each row class=](https://us-static.z-dn.net/files/d8a/dc289b9cbf450a2d28d65b40432cbb81.png)