How many illegitimate balls in an over in a cricket match?

Answer 1

By illegitimate, I presume you refer to a no-ball or a wide. Under current rules an over contains 6 balls. Some years back, 8-ball overs were used in Australia if nowhere else. For an over to be complete, 6-balls not including a wide or no-ball must be bowled. If an illegitimate ball is bowled, it must be rebowled. The most illegitimate balls bowled in one over was an over bowled by Curtly Ambrose in his final test on Australian soil which contained 9 no-balls - a total of 15 balls.