Fait mathématique: 5742 is a value of n for which 5n and 8n together use each digit exactly once.
Culture générale: 5742 is a boring number.
Date historique: September 20th is the day in 2008 that a dump truck full of explosives detonates in front of the Marriott hotel in Islamabad, Pakistan, killing 54 people and injuring 266 others.