Quiz: Matrix

A matrix numbers letter positions. If A=(0,1) etc — used to encode letters?

In 3×3 matrix, position (2,2) refers to:

Which cell is diagonal from (1,1) in 3×3?

Number of cells in 4×4 matrix:

Sum along a row of 5 cells each valued 3:

In magic square 3×3, magic sum =

Anti-diagonal of 3×3 starting (1,3):

If Row1: 2,4,6; each doubled → Row1:

Transpose of 2×3 matrix has dims:

Identity 3×3 has diagonal: