How many instruments accompany someone singing "a cappella"?

More Questions:

What is the name of the six-pointed star which is the symbol of Judaism?

What NBA star was known for his signature spin move, the Dream Shake?

Who wrote the the novel "The Dam Busters"?

The Shenandoah Valley is located in which eastern US state?

Which former Soviet Republic in Central Asia has Tashkent as its capital?

What was Mohammed Ali said to float like?

Who lives in a garbage can on the TV show "Sesame Street"?

What country singer was the first person to "turn a chair" on season 2 of the TV show "The Voice"?

In the movie "The Hunger Games', who fights with a bow and arrow besides Katness?

What did Marilyn Monroe claim was the only thing she wore in bed?

What did Seymour give to Jake as a birthday present in the movie "One Hour Photo"?

In the movie "Monsters Inc.', what are the monsters most scared of?

Who shot JR?

What did the class entering Harvard in the fall of 1967 have for the first time?

What year was the original film "Friday the 13th" released?