Question # 1

-2, 1, 4, 7,.... is ______

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Harmonic sequence

Arithmetic sequence

Geometric sequence

Arithmetic series

The matrix A = [aij]mxn with m≠n is

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Rectangular

Symmetric

Square

None

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z is purely imaginary

a is any complex number

z is real

None of these

The function whose range consists of just one element is called

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One-One Function

Identity Function

Onto Function

Constant Function

A combination lock on a suitcase has 3 wheels each labeled with nine digits from 1 to 9. If an opening combination is a particular sequence of three digits with no repeats, the probability of a person guessing the right combination is

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1 / 500

1 / 504

1 / 252

1 / 250

If a polynomial p(x) is divided by x-c, then the remainder is

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p(x)

x-c

c

P(c)

Two circles x2 +y2 +8x -9= 0 and x2+y2+6y +k =0 touchinternallyif the value of k is

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k = 9

k = ±9

k=-9

k=11

(a^-1)^-1=

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a^-1

a

-a

None of above

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If A is a subset of B and B contains at least one element which is not an element of A, then A is said to be

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Improper subset of B

Super set of B

Proper subset of B

None of these

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Imaginary

Rational

Irrational

Real numbers

Ifα,βare the roots of ax²+ bx + c = 0 andα+ h,β+ h are the roots of px²+ qx + r=0, then h =

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x²+ x - 6 = 0 is

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An equation

An identity

A polynomial

None of these

The first three terms in the expansion of (1 - x)^-3are

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1 + 3x + 6x²

1 - 3x + 6x²

-3 - 3x - 6x²

1 - 3x - 6x²

Every identity matrix is

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Row-vector

Scalar

Column-vector

All

The direction cosines of a line equally inclined with co-ordinate axes are

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2²- n - 1

1 - 2^-n

n + 2^-n-1

2ⁿ- 1

i is equal

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(1 , 0)

(0 , 1)

(1 , 1)

(0 , 0)

The distance of the point (2,3) from origin is

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5

2

3

Gooch crucible is made of :

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Brass.

Porcelain.

Bronze.

Gold.

The set of natural no. is closed under

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multiplication

subtraction

difference

division

Every recurring decimal represents

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A natural number

A rational number

An irrational number

A whole number

A non-terminating, non-recurring decimal represent

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A natural number

A rational number

An irrational number

A prime number

The square root of 2i - 20i is

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±(5 - 2i)

±(5+ 2i)

(5 - 2i)

None of these

If either A = 0 or B =0,then Ax2 +By2 +2Gx +2Fy +c =0 represents a

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Circle

Hyperbola

Ellipse

Parabola

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The maximum value of 12 sinθ-9 sin²θis x

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3

4

5

None of these

If A and B are two matrices such that AB = B and BA =A, then A²+ B²=

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2 AB

2 BA

A + B

AB

Let A be a square matrix. Then, 1/2 (A-A') is

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Skew-symmetric

Symmetric

Null

None of the above

What is the circular measure of the angles between the hands of which at 4 o clock

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π/6

3π/2

π/4

2π/3

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