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WorksheetsMatrix Magic 3
Total questions: 40
Worksheet time: 8hrs 9mins
Name
Class
Date
1.
a=1 b=2
c=3 d=4
find determinant
c=3 d=4
find determinant
a)
-2
b)
2
c)
2
d)
7
2.
a=-1 b=5
c=2 d=8
find determinant
c=2 d=8
find determinant
a)
5
b)
-18
c)
2
d)
-3
3.
a=6 b=6
c=1 d=1
find determinant
c=1 d=1
find determinant
a)
6
b)
0
c)
12
d)
1
4.
a=4 b=-1
c=-1 d=4
find determinant
c=-1 d=4
find determinant
a)
14
b)
15
c)
17
d)
-1
5.
a=-2 b=2
c=4 d=3
find determinant
c=4 d=3
find determinant
a)
-14
b)
10
c)
-6
d)
2
6.
a=10 b=-2
c=-3 d=1
find determinant
c=-3 d=1
find determinant
a)
14
b)
4
c)
16
d)
0
7.
a=2 b=5
c=-5 d=10
find determinant
c=-5 d=10
find determinant
a)
25
b)
-5
c)
45
d)
1
8.
a=16 b=-1
c=-1 d=1
find determinant
c=-1 d=1
find determinant
a)
15
b)
16
c)
-1
d)
17
9.
a=3 b=9
c=1 d=3
find determinant
c=1 d=3
find determinant
a)
9
b)
0
c)
3
d)
27
10.
If a 2X2 matrix has 2 rows and 2 columns
then how many rows does a 4X3 matrix have?
then how many rows does a 4X3 matrix have?
a)
4
b)
3
c)
2
11.
In Matrix R (pictured) what element is in the second row, third column?
a)
8
b)
9.01
c)
6
d)
1
12.
Subtract
a)
-5
-8
3
10
-8
3
10
b)
-9
8
3
2
8
3
2
c)
5
-8
3
10
-8
3
10
d)
-5
8
3
2
8
3
2
13.
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
14.
What are the dimensions of this matrix?
a)
2 x 3
b)
3 x 2
c)
6 x 1
d)
1 x 6
15.
Dimensions?
a)
a
b)
b
c)
c
d)
d
16.
Perform the indicated operation. If it’s not possible, select Not Possible.
a)
7
-7
-6
20
-7
-6
20
b)
7
-9
-6
20
-9
-6
20
c)
Not Possible
d)
7
-9
2
20
-9
2
20
17.
Identify
a)
Cramer's Rule
b)
row echelon form
c)
Identity matrix
d)
inverse matrix
18.
How many columns are in a 5 x 4 matrix?
a)
5
b)
4
c)
20
d)
9
19.
Given matrices A & B:
A is a (4x33) matrix
B is a (33x1) matrix
What are the dimensions of the product of A times B?
A is a (4x33) matrix
B is a (33x1) matrix
What are the dimensions of the product of A times B?
a)
4x1
b)
4x33
c)
33x1
d)
Matrix does not exist
20.
Which of the following has a determinant of 0?
*det= ad-bc
*det= ad-bc
a)
⌈1 0⌉
⌊2 3⌋
⌊2 3⌋
b)
⌈-4 -2⌉
⌊6 3⌋
⌊6 3⌋
21.
Multiply the matrices
a)
A
b)
B
c)
C
d)
D
22.
Perform scalar multiplication on the matrix
a)
A
b)
B
c)
C
d)
D
23.
Dimensions?
a)
a
b)
b
c)
c
d)
d
24.
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
25.
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
26.
Perform the following operation
a)
b)
c)
d)
e)
not possible
27.
What do a, b, c and d equal in this matrix addition?
a)
a = -1, b = 10, c = 7, d = -11
b)
a = -1, b = 10, c = -11, d = 7
c)
a = 10, b = -1, c = 7 , d = -11
d)
a = 10, b = -1, c = -11, d = 7
28.
Find the determinant of the matrix
a)
A
b)
B
c)
C
d)
D
29.
Solve for the determinant of the following matrix:
⌈12 −3⌉
⌊−6 15⌋
*detA= ad-bc
⌈12 −3⌉
⌊−6 15⌋
*detA= ad-bc
a)
198
b)
162
c)
-333
d)
-9
30.
Calculate the determinant
a)
0
b)
none
c)
-32
d)
-8
31.
Does this matrix have an inverse?
a)
Yes
b)
No
c)
Maybe
d)
I don't know
32.
These matrices are being multiplied. Determine the dimension/size of the new matrix.
a)
Can't multiply them
b)
4 x 2
c)
3 x 3
d)
4 x 3
33.
Find the product of the two matrices.
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
34.
Find the product of the matrices.
a)
A
b)
B
c)
C
d)
D
35.
Find the determinant's value
a)
-18
b)
-23
c)
-2
d)
2
36.
Calculate the determinant
a)
0
b)
-15
c)
-70
d)
10
37.
Evaluate the determinant of the matrix.
a)
68
b)
-49
c)
-83
d)
-75
38.
Evaluate the determinant of the matrix.
a)
40
b)
30
c)
20
d)
10
39.
Evaluate the determinant of the matrix.
a)
695
b)
284
c)
392
d)
-179
40.
Find the determinant of the matrix
a)
A
b)
B
c)
C
d)
D
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