WorksheetsMatrices
Total questions: 21
Worksheet time: 3hrs 14mins
Name
Class
Date
1.
What is a Matrix?
a)
An equation of over 5 numbers or symbols
b)
A set of numbers in rows and columns
c)
A method of finding the nth value of a series
d)
A complicated number system
2.
What is the name of each entry of a matrix?
a)
Row
b)
Element
c)
Dimension
d)
Rectangle
3.
How many columns are in a 5 x 4 matrix?
a)
5
b)
4
c)
20
d)
9
4.
In Matrix R (pictured) what is the value of the third element in the second column?
a)
8
b)
9.01
c)
6
d)
1
5.
What are the dimensions of this matrix?
a)
2 x 3
b)
3 x 2
c)
6 x 1
d)
1 x 6
6.
What must be true in order to ADD two matrices?
a)
They must be square.
b)
The dimensions must be equal.
c)
The determinant can't equal 0.
d)
The column of the 1st must equal the row of the 2nd.
7.
Add
a)
11 8
-4 2
-4 2
b)
3 2
-6 -6
-6 -6
c)
-3 2
-4 -6
-4 -6
d)
10 8
-6 2
-6 2
8.
Subtract
a)
3 -8
0 -1
0 -1
b)
3 -4
8 -13
8 -13
c)
-3 8
0 1
0 1
d)
3 -8
-8 1
-8 1
9.
You can multiply a 2X3 matrix by which matrix?
a)
2X2
b)
2X12
c)
3X12
d)
2X3
10.
Multiply
a)
1 2
6 -8
6 -8
b)
-3 -5
-5 -11
-5 -11
c)
-2 8
-6 -12
-6 -12
d)
2 -3
5 -2
5 -2
11.
What do w, x, y and z equal in this matrix subtraction?
a)
w = 13, x = 4, y = 7, z = 23
b)
w = 13, x = -4, y = 11, z = 23
c)
w = 13, x = 4, y = 11, z = 23
d)
w = 13, x = 4, y = 11, z = 17
12.
Name the dimensions:
a)
6x2
b)
2x6
c)
12
d)
36
13.
What is the value of the third element in the fourth row?
a)
2
b)
-3
c)
6
d)
1
14.
Multiply
a)
20 15 -10
30 -5 0
30 -5 0
b)
-20 15 -10
30 -5 0
30 -5 0
c)
1 8 3
11 4 5
11 4 5
d)
20 -15 10
-30 5 0
-30 5 0
15.
Find the product.
a)
undefined
b)
-3 16
17 12
8 -10
17 12
8 -10
c)
3 12
-15 -8
-1 -3
-15 -8
-1 -3
16.
find: B*A
a)
47 30
9 5
9 5
b)
17 15
42 35
42 35
c)
10 25
7 1
7 1
d)
not possible because rows do not match columns
17.
a)
-5
b)
5
c)
0
d)
2
18.
a)
b)
c)
d)
19.
a)
b)
c)
d)
20.
What comes first in the dimension?
a)
Row
b)
Column
21.
The matrix A - B is
a)
b)
c)
d)
100 %
