Historical clue formulations

• About 35,000 for the Taj Mahal: Abbr. — 2025-12-18
• About 6.5 million for the Pentagon: Abbr. — 2016-08-10
• Carpet meas. — 2009-02-26
• Apt. area measurement — 2008-11-25
• Room meas. — 1999-02-02