Question # 1

The imaginary part of the complex number a + bi is:

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a

b

bi

none of these

Sum of integral multiples of there between 4 and 22 is:

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81

75

211

none

If a matrix A is symmetric as well as skew symmetric, then:

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A is null matrix

A is unit matrix

A is triangular matrix

A is diagonal matrix

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x = 0

y = 0

x = 0 and y = 0

x = 0 or y = 0

The multiplicative identity of real numbers is:

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0

1

2

-1

Minors and co-factors of the elements in a determinant are equal in magnitude but they may differ in:

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order

position

sign

symmetry

For what value of k, the sum of the roots of the equation x² + kx + 4 = 0 is equal to the product of its roots:

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±1

4

±4

-4

The in-radius r of a triangle is given by:

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The series 3 + 33 + 333 + ...... is:

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A.P

G.P

H.P

none of these

A^-1 exists if A is:

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singular

nonsingular

symmetric

none

S = {1, -1, 2, -2} is a group under:

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multiplication

subtraction

addition

none of these

A matrix of order m×1 is called:

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row matrix

column matrix

identity matrix

scalar matrix

The middle term in the expansion of (a+b)²⁰ is;

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10^th term

11^thterm

12^thterm

13^thterm

No. of signals made by 4 flags of different colors using 2 flags at a time:

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6

12

60

none

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4

16

8

64

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The range of y = cos^-1 x function is:

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The set of all rational numbers between 2, 3 is:

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an empty set

an infinite set

a finite set

a power set

Inverse sine function is written as:

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(sin x)^-1

sin x^-1

arc sinx

arc sin^-1 x

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A

B

The probability that a number selected from the numbers 1, 2, 3, 4, 5, ......, 16 is a prime number is:

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