Take a Chance on This ABBA Quiz

The group was first known as Festfolket.

"ABBA" is an acronym.

They stand for Agnetha (Faltskog) and Anni-Frid (Lyngstad).

The two "B"s in ABBA stand for Benny (Andersson) and Bjorn (Ulvaeus).

Although her family moved to Torshalla, Sweden, when she was a toddler, Anni-Frid Lyngstad ("Frida") was born in Norway.

Bjorn and Agnetha married in 1971; Benny and Frida married in 1978.

Benny was keyboardist with the Hep Stars. In Sweden the Hep Stars were nicknamed "the Swedish Beatles."

Bjorn played guitar with the Hootenanny Singers.

Agnetha played Mary Magdalene in the Swedish production of "Jesus Christ Superstar" in 1971.

"Ring Ring" was released in 1973, "Waterloo" in 1974 and "ABBA" in 1975.

Although it's written as "ABBA," the first "B" in the acronym is, technically, backward in the logo.

When "People Need Love" was cut in 1972, it was credited to "Bjorn and Benny, Agnetha and Anni-Frid."

After winning the Eurovision Song Contest in 1974, "Waterloo" charted around the world. In the U.S., "Waterloo" reached No. 6 on Billboard.

ABBA played their first North American city, Edmonton, Alberta, on Sept. 13, 1979.

After opening in Edmonton, Alberta, on Sept. 13, ABBA played in Vancouver, British Columbia, on Sept. 15 and then in Seattle on Sept. 17.

According to the band members, they saved money by exploiting a Swedish law that determined clothes were tax deductible if their owners could prove they were not used for daily wear.

Bjorn was a jogger, running 5-6 miles (8-10 kilometers) a day.

According to Bjorn in interviews, he would sing a "tck-a-ch"-style rhythm to himself while jogging, which led to the song's lyrics.

Most of ABBA's music videos and "ABBA: The Movie" were directed by Lasse Hallstrom, Academy Award-winner for “My Life as a Dog” and “The Cider House Rules."

Famously protective of ABBA's music, Bjorn and Benny sued the KLF over an unauthorized sample from “Dancing Queen” in 1987. The Fugees and Madonna were both given permission to sample ABBA's work.

Bjorn, Agnetha and their daughter Linda were promoting Semper's baby food.

ABBA: The Museum opened in 2013 in Stockholm.

When "Slipping Through My Fingers" was released as a promo single in Japan in 1980, it was on red vinyl.

ABBA only topped the American charts once, with "Dancing Queen," which stayed at No. 1 for a week in April 1977.

Bjorn worked on the orchestration for "Mamma Mia!"

"Mamma Mia!" premiered in 1999 and has grossed more than $2 billion since.

The film adaptation of "Mamma Mia!" hit screens in 2008, co-produced by Bjorn.

Bjorn and Agnetha, married in 1971, divorced in 1979; Benny and Frida, married in 1978, divorced in 1981.

Divorce, strained relationships and solo interests led to the end of the group in 1982.

ABBA was inducted into the Rock and Roll Hall of Fame in 2010.