3QUESTION 3 OF 3
Answer & explanation
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
500,000,000
Rubik's Cubes
How to estimate it
Fermi’s official “Napkin math”
Start with the world, about 8 billion people. How many have ever bought a Rubik's Cube? Lots of homes have one, but not most. Maybe 1 in 20.
- World population
- 8,000,000,000
- Bought a cube
- ≈ 1 in 20
- 8B ÷ 20
- ≈ 400,000,000
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Cubes sold by the 50th anniversary (Spin Master, via Fortune, Dec 2024)
- ≈ 500,000,000
- Official cubes sold in 2022 alone (Circana)
- 5,750,000
- ≈
- 500,000,000
Reference cited by Fermi: Spin Master, owner of the Rubik's brand, via Fortune (December 2024): roughly 500 million cubes sold since launch
How close was your guess?
Your comparison will appear here.
Compare by ratio: divide the larger number by the smaller one. The closer to 1×, the better.