Word of the week: the very new “ringback,” which is an audio clip that can replace the ringing sound that telephone callers hear while waiting for someone to pick up. Ringbacks, like ringtones, are big business. The Alicia Keys tune “No One” recently became the first gold ringback, with sales exceeding 500,000.

n Starring trios update: Thanks to the Trivia Detectives who unearthed these threesomes who starred in two relatively recent films with different roles: Ben Affleck, Matt Damon and Jason Lee in “Chasing Amy” and “Dogma” (Jeremy Huie, Lafayette, Calif.) and Kathleen Turner, Michael Douglas and Danny DeVito in “Romancing the Stone” and “The War of the Roses” (Steve Anderson of Seattle).

All of the 150-or-so species of chameleons are able to change their skin color. This is not, as commonly believed, to adapt to their surroundings, but rather as an expression of their physical condition. About half of all the known chameleon species are found in what specific location?

A) Mexico

B) Montana

C) Madagascar

D) Morocco

Friday’s answer: “Air dragon” is the Russian term for a kite.