A hundred problems with a time and score box at the top, drawn from all four operations at once. A mixed drill tests something a single-operation page cannot: whether a student can switch between operations without stopping to think about which one they are doing.
Untick any operation above to narrow it - all multiplication gives you a times tables drill, addition and subtraction alone gives the classic mad minute. A drill is only worth timing if the sheet changes, and every sheet here is generated from scratch, so the same settings tomorrow give a genuinely different hundred problems.
One to five minutes is typical. A hundred problems suits a five-minute drill; drop to 60 or 30 with Number of Problems Per Page for something shorter.
The header prints Score: ___ / 100, or whatever the page count is, so the same sheet records how many were right as well as how long it took.
Yes - untick the others above. There are ready-made pages for the common cases: Times Tables Worksheets for multiplication, Mad Minute Math for addition and subtraction.
Yes - switch Timed Test off and the sheet prints with the usual name and date header instead.