Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_15 ( strike_rate INTEGER, matches VARCHAR, average VARCHAR )

### Question ###
What is the highest Strike Rate when the average is less than 50.25 with less than 13 matches played?

### Accurate SQL ###

SELECT MAX(strike_rate) FROM table_name_15 WHERE matches < 13 AND average < 50.25