2QUESTION 2 OF 3
Answer & explanation
A standard double-six set
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
168
pips
How to estimate it
Fermi’s official “Napkin math”
A double-six set has 28 tiles. Each half of a tile runs from blank up to six, so the average half is about three. That puts the average tile at six pips.
- Tiles in a set
- 28
- Average pips per tile
- × 6
- 28 × 6
- = 168
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Tiles in a double-six set
- = 28
- Each number 0 to 6 appears on 8 tile halves
- = 8 × (0+1+2+3+4+5+6)
- 8 × 21
- = 168
Reference cited by Fermi: Standard double-six domino set composition
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.