In math, what lists can be summed into series?

More Questions:

The game "cat's cradle" is played using what material?

Who donated the only sock displayed on its own in the Baseball Hall of Fame?

What common lasagna ingredient is actually a by-product of mozzarella?

What Marvin Hamlisch musical is about dancers auditioning for a musical?

In what city would you find the most famous street named "Nevsky Prospekt"?

What is Greenland called by its Inuit native residents?

In what country would you find the active volcano "Etna"?

What TV show did "Trapper John, M.D." spin off from?

Which Scientologist was trapped in the closet in the "Trapped in the Closet" episode of South Park?

In what movie does Sid Caesar cameo as football coach Calhoun?

What model car did Thelma and Louise drive?

In what movie did Charlie Sheen play the character Bud Fox?

What Tom Cruise movie takes place in the year 2054?

What year did Charles Dickens publish a novella entitled "A Christmas Carol"?

Which British actor played the role of Spider-Man in the 2016 film "Captain America: Civil War"?