Question # 1

In ax² + bx + c = 0, if b² - 4ac > 0 and perfect square the roots are:

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rational

irrational

equal

complex

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3

1

4

None

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equal sets

null sets

overlapping sets

subsets

Sum of all four fourth roots of unity is:

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1

0

-1

3

Fifth term of the sequence 2, 6, 11, 17.

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24

41

32

No. of diagonals can be formed by joining the vertices of the polygon having 12 sides ?

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70

54

70

73

If A and B are two matrices, then:

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A B = O

AB = BA

AB = I

AB may not be defined

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

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a

b

bi

none of these

The factorial of positive integer is:

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rational no.

positive integer

real no.

none

If tan Θ > 0 and sin Θ < 0 then terminal arm of the angle lies in quadrant:

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I

II

III

IV

The other name of quadratic equation is:

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linear equation

1st degree equation

2nd degree equation

none

r₁=

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A

B

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0

If the roots of x² - bx + c = 0 are two consecutive integers, then: b² - 4ac =

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0

1

-1

2

In any triangle ABC, law of sines is:

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No. of ways of solving a quadratic equation:

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1

3

2

4

In how many ways two places can be filled by n objects:

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n(n-1)

2!

n(n+1)

None

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diagonal matrix

A key ring is an example of:

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permutation

circulation permutation

combination

none

Synthetic division is a process of:

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division

subtraction

addition

multiplication

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