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Q:

If x + y = 12 and $x^{2} + y^{2} = 94$ , then xy is

A) 25	B) 50
C) 144	D) 238

Answer & Explanation Answer: A) 25

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Filed Under: Simplification
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Q:

If ${√(1 - sin}^{2} A) = x$ , then the value of x is

A) tanA	B) cosA
C) cosecA	D) secA

Answer & Explanation Answer: B) cosA

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Q:

Simplify $486 b^{3} x^{2} a^{4} z^{3} / 27 a^{3} b^{2} z$

A) 18bx2az2	B) 18bx2a2z
C) 36ba2z	D) 36bxaz

Answer & Explanation Answer: A) 18bx2az2

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Q:

Which of these is not a web browser?

A) Chrome	B) Firefox
C) Safari	D) Linux

Answer & Explanation Answer: D) Linux

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Filed Under: Computer
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Q:

What is the value of $cosecA / \sqrt ({cosec}^{2} A - 1)$ ?

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

Answer & Explanation Answer: B) secA

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Q:

If x - y = 7 and x + y = 13, then $x^{2} - y^{2}$ is

A) 91	B) -30
C) 30	D) -91

Answer & Explanation Answer: D) -91

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Q:

If 3x - 7 = 5x - 1, then the numerical value of ${(x - 4)}^{2}$ is

A) 1	B) 49
C) -1	D) -49

Answer & Explanation Answer: B) 49

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Q:

If a + b = 10 and ab = 24, then the value of $a^{3} + b^{3}$ is

A) 280	B) 370
C) 520	D) 730

Answer & Explanation Answer: A) 280

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