Question # 1

If W = {0, 1, 2, 3, 4, ........}, N = {1, 2, 3, 4 ...........} then N - W = ?

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W

{0}

none of these

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diagonal matrix

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r₁

r₂

r₃

r

y = sin^-1 x if and only if x = sin y, where:

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Two matrices X and Y are equal if and only if:

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X and Y are of same order

Their corresponding elements are equal

Both a and b

None of these

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quadratic equation

reciprocal equation

exponential equation

none of these

If n(S) = 3 then n {P(S)} =

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2

8

16

4

If sin α = cos ß in any triangle ABC then:

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α + ß = 90°

α + ß = 180°

α + ß = 360°

α + ß

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

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No. of arrangements of the letters of the word PAKISTAN can be made, taken all together ?

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21160

20160

20170

20016

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

If each element in any row or each element in any column of a square matrix is zero, then value of the determinant is:

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0

1

-1

none of these

If a_n-1 = 2n - 3 then a_n+1 =

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2n - 1

2n + 1

2n + 3

none

If two sets have no element common, they are called:

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disjoint

over lapping

dissimilar

exhaustive

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cancellation property w.r.t multiplication

cancellationproperty w.r.t addition

multiplicativeproperty

additiveproperty

If sets A and B are equal then:

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

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multiplication

subtraction

addition

none of these

If A is a square matrix order 3 × 3 the |kA| equals:

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k |A|

k²|A|

k³ |A|

k⁴ |A|

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Sum of roots of ax² + bx + c = 0 is equal to product of roots only if:

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a+c=0

b+c=0

a+b=0

a+b+c=0

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