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WorksheetsMatrices
Total questions: 20
Worksheet time: 40mins
Name
Class
Date
1.
What size is this matrix?
a)
2x2
b)
2x3
c)
3x2
d)
1x6
2.
What is the determinant of this matrix?
a)
-2
b)
2
c)
10
d)
24
3.
What is the determinant of this matrix?
a)
5
b)
-5
c)
0
d)
-12
4.
What is the formula for the determinant of a 2x2 matrix?
a)
ad-bc
b)
ab-cd
c)
ad+bc
d)
(a+d)(b+c)
5.
What is the determinant of this matrix?
a)
0
b)
24
c)
-24
d)
-12
6.
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
7.
What are the dimensions of this matrix?
a)
2 x 3
b)
3 x 2
c)
6 x 1
d)
1 x 6
8.
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
9.
What are the dimensions of this matrix?
a)
3x1
b)
1x3
c)
3x3
d)
1x1
10.
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.
11.
In Matrix R (pictured) what element is in the second row, third column?
a)
8
b)
9.01
c)
6
d)
1
12.
The bookshop of a particular school has 10 dozen chemistry books, 8 dozen physics books, 10 dozen economics books. Their selling prices are Rs 80, Rs 60 and Rs 40 each respectively. Find the total amount the bookshop will receive from selling all the books using matrix algebra.
a)
20160
b)
20106
c)
20100
d)
NONE OF THE ABOVE
13.
a)
1
b)
2
c)
3
d)
0
14.
a)
-3
b)
0
c)
1
d)
none iof these
15.
Find the product of the two matrices.
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.
a)
b)
c)
d)
17.
a)
A
b)
B
c)
C
d)
D
18.
a)
x = 25, y = -7
b)
x = 14, y = 2.5
c)
x = 25, y = 7
d)
x = 3, y = -9.5
19.
a)
A
b)
B
c)
C
d)
D
20.
a)
A
b)
B
c)
C
d)
D
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