Grammar: Plurals and article insertion for clarity

Author: Trifall

docs/concept/numeric.md

@@ -35,7 +35,7 @@ app.get('/id/:id', ({ params: { id } }) => id, {
 })
 ```
 
-However, it's a little bit redundant and require a boilerplate, so Elysia has a custom type to speed up the situation with `t.Numeric`
+However, it's a little bit redundant and requires boilerplate, so Elysia has a custom type to speed up the situation with `t.Numeric`
 
 ```ts
 app.get('/id/:id', ({ params: { id } }) => id, {
@@ -45,11 +45,11 @@ app.get('/id/:id', ({ params: { id } }) => id, {
 })
 ```
 
-This allows us to convert **valid** numeric string to number automatically.
+This allows us to convert a **valid** numeric string to a number automatically.
 
-If string is not a valid numeric string, it will throw an error in the runtime and prevent and execution inside the handler.
+If the string is not a valid numeric string, it will throw an error in the runtime and prevent execution inside the handler.
 
-You can use numeric type on any property that support schema typing, including:
+You can use the numeric type on any property that supports schema typing, including:
 - params
 - query
 - headers