Matrix Operations Quiz (5 Questions)

1. Can you add a 2 × 2 matrix and a 2 × 3 matrix? Why?

2. Find:
   [ 1 3 ] + [ 2 4 ]
   [ 5 7 ] [ 6 8 ]

3. Multiply the matrix by 2:
   [ 4 1 ]
   [ 3 6 ]

4. True or False: Matrix multiplication is commutative.

5. What must be true to multiply two matrices?

Answer Key

1. No, dimensions must match

2. [ 3 7 ]
   [ 11 15 ]

3. [ 8 2 ]
   [ 6 12 ]

4. False

5. Columns of first = rows of second