WONDER #1142: Why Do Pianos Have 88 Keys?

Question 1 of 3

What major piano manufacturer moved to 88 keys in the late 19th century, leading many other piano manufacturers to do the same?

  1. Steinway
  2. Stuart and Sons
  3. Boesendorf
  4. Casio

Question 2 of 3

The Stuart and Sons “super” grand piano has how many extra keys?

  1. 60
  2. 14
  3. 88
  4. 102

Question 3 of 3

The black keys on a piano represent what compared to the white keys?

  1. sharps
  2. flats
  3. half steps
  4. all of the above

Check your answers online at https://wonderopolis.org/wonder/why-do-pianos-have-88-keys.