Historical clue formulations

• Without variation — 2015-03-15
• In a fair manner — 2010-08-18
• How to divide things to be fair — 2006-11-27
• Without highs and lows — 2005-04-12
• Leaving no remainder — 2004-01-14
• In a monotone — 2001-08-24
• With nothing left over — 1998-07-26
• Half-and-half — 1998-06-20
• Without variations — 1998-03-13