If 1 = Single, 2 = Double, 3 = Triple, 4 = Quadruple, what are 5, 6, 7, 8, etc. called?
The determinant of [math]\begin{bmatrix}-2 & 7 & 6 \\ 5 & 1 & -2 \\ 3 & 8 & 4 \end{bmatrix}[/math] is [math]0[/math]. Is there some mathematical fact that would have revealed this with the minimal amount of calculation?