Question # 1

If 4 ⁶P_r= ⁶P_r+1, then r is equal to

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4

3

2

1

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1

-1

5

2

If 4 - x >5, then

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x > 1

x > -1

x < 1

x < -1

The product of the four fourth roots of unity is

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0

1

-1

None of these

Which of the following is a scalar.

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electric field

magnetic field

weight

mass

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The magnitude of vector a 2i-7j is

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√23

√43

3

√53

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Scalar matrix

Identity matrix

Null matrix

Symmetric matrix

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8

9

10

11

If the sum of co-efficient in the expansion of (a+b)ⁿis 4096, then the greatest co-efficient in the expansion is

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1594

792

924

2924

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