# Math Quiz For Class 9th

50 Questions | Total Attempts: 28

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• 1.
The idea of Matrices was given by
• A.

Arthur Cayley

• B.

Briggs

• C.

Al-Khawarzmi

• D.

John Napier

• 2.
The order of matrix [ 2   1] is __________
• A.

2-by-1

• B.

1-by-2

• C.

1-by-1

• D.

2-by-2

• 3.
It is called ____________ matrix:
• A.

Zero

• B.

Unit

• C.

Scalar

• D.

Singular

• 4.
Order of transpose   is _____________:
• A.

3-by-2

• B.

2-by-3

• C.

3-by-1

• D.

1-by-3

• 5.
Product of
• A.

[2x+y]

• B.

[x-2y]

• C.

[2x-y]

• D.

[x+2y]

• 6.
X is equal to _______________ if :
• A.

9

• B.

-6

• C.

6

• D.

-9

• 7.
• A.

Option

• B.

Option

• C.

Option

• D.

Option

• 8.
For ______ value of x,    will be singular matrix.
• A.

3

• B.

-4

• C.

3

• D.

4

• 9.
Arthur Cayley introduced the "Theory of Matrices" in ____________
• A.

1854

• B.

1856

• C.

1858

• D.

1860

• 10.
Order of square matrix is:
• A.

2-by-2

• B.

1-by-2

• C.

2-by-1

• D.

3-by-2

• 11.
A square matrix M is called to be skew symmetric, if:
• A.

Mt=Mt

• B.

Mt=1/M

• C.

Mt=-M

• D.

Mt = M

• 12.
When the number of rows is not equal to the number of columns, the matrix is called____________:
• A.

Square matrix

• B.

Rectangular matrix

• C.

Symmetric matrix

• D.

Row matrix

• 13.
x is equal to, If
• A.

Option

• B.

Option

• C.

Option

• D.

Option

• 14.
Real part of 2ab(i+i2) is ______________
• A.

-2ab

• B.

2ab

• C.

3ab

• D.

-3ab

• 15.
Ifx,y,z ∈ R, z<0 then, x<y⇒ _____________:
• A.

Xz

• B.

Xz>yz

• C.

Xz=yz

• D.

None of these

• 16.
The value of i9 is ____________
• A.

1

• B.

-1

• C.

I

• D.

-i

• 17.
Imaginary part of -i(3i+2) is ___________
• A.

-2

• B.

2

• C.

3

• D.

-3

• 18.
(3+√ 2)(3-√ 2) is equal to
• A.

7

• B.

-7

• C.

-1

• D.

1

• 19.
(27x-1)-2/3
• A.

3√x2/9

• B.

√x3/9

• C.

3√x2/8

• D.

√x3/8

• 20.
• A.

3√42

• B.

√43

• C.

3√43

• D.

√46

• 21.
• A.

3

• B.

1/3

• C.

35

• D.

(35)1/3

• 22.
The logarithm of unity to any base is:
• A.

1

• B.

10

• C.

E

• D.

0

• 23.
The relation y=logzx implies
• A.

Xy=z

• B.

Zy=x

• C.

Xz=y

• D.

Yz=x

• 24.
Log e = __________, where e ≈ 2.718
• A.

0

• B.

0.4343

• C.

• D.

1

• 25.
If ax=n, then:
• A.

A=logxa

• B.

X=logna

• C.

X=logan

• D.

A=lognx