# 27/Historical Note

< 27
## Historical Note on $27$
The total score of all the coloured balls in snooker is $27$:
 $\ds \text{Yellow}$ $:$ $\ds 2$ $\ds \text{Green}$ $:$ $\ds 3$ $\ds \text{Brown}$ $:$ $\ds 4$ $\ds \text{Blue}$ $:$ $\ds 5$ $\ds \text{Pink}$ $:$ $\ds 6$ $\ds \text{Black}$ $:$ $\ds 7$
and $2 + 3 + 4 + 5 + 6 + 7 = 27$, which is one less than the $7$th triangular number $28$.