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Q:

Determine the value of z in the equation: $z = \sqrt{20 + \sqrt{20 + \sqrt{20 + \sqrt{20 + . . . \infty}}}}$

A) 4	B) 5
C) 20	D) 25

Answer & Explanation Answer: B) 5

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Q:

What is the value of $(2 - 2 z + z^{2}) (2 + 2 z - z^{2}), when z + \frac{2}{z} = 2 ?$

A) 0	B) 2
C) 4	D) 8

Answer & Explanation Answer: A) 0

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Q:

If $2 \cos^{2} A - 1 = x$ , then the value of x is

A) cosec4A - sin4A	B) cos4A - sin4A
C) cos4A - tan4A	D) cosec4A - tan4A

Answer & Explanation Answer: B) cos4A - sin4A

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Q:

If $\sqrt ({cosec}^{2} A - 1) = x$ , then the value of x is

A) tanA	B) sinA
C) cosA	D) cotA

Answer & Explanation Answer: D) cotA

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Q:

Coefficient of $x^{2} in (x + 7) (5 - 3 x) (3 x - 6) is$

A) 96	B) -30
C) 42	D) -18

Answer & Explanation Answer: B) -30

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Q:

If xy = 48 and $x^{2} + y^{2} = 100$ , then (x + y) is

A) 12	B) 16
C) 18	D) 14

Answer & Explanation Answer: D) 14

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Q:

If (6x - 5) = (4x + 7), then the numerical value of ${(x + 1)}^{3}$ is

A) 216	B) 125
C) 64	D) 343

Answer & Explanation Answer: D) 343

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Q:

What is the value of $\cos^{2} A / (1 + sinA) ?$

A) 1 + sinA	B) 1 - sinA
C) 1 - secA	D) 1 + secA

Answer & Explanation Answer: B) 1 - sinA

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