Lakshya Education MCQs

Question: If m - 5n = 2, then the value of (m3 - 125n3 - 30mn) is?
Options:
A.6
B.7
C.8
D.9
Answer: Option C

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More Questions on This Topic :

Question 1. If $$x + \frac{1}{x} = 2{\text{,}}$$   then the value of $${x^{12}} - \frac{1}{{{x^{12}}}}$$   is?
  1.    -4
  2.    4
  3.    2
  4.    0
Answer: Option D
Question 2. If $$x + \frac{1}{x} = 1{\text{,}}$$   then the value of $$\frac{{{x^2} + 3x + 1}}{{{x^2} + 7x + 1}}$$   is?
  1.    $$\frac{1}{2}$$
  2.    $$\frac{3}{7}$$
  3.    2
  4.    3
Answer: Option A
Question 3. If $$x + \left( {\frac{1}{x}} \right) = 2{\text{,}}$$   then the value of $${x^7}{\text{ + }}\left( {\frac{1}{{{x^5}}}} \right)$$   is?
  1.    25
  2.    212
  3.    2
  4.    27
Answer: Option C
Question 4. $$\frac{{m - {a^2}}}{{{b^2} + {c^2}}}$$   + $$\frac{{m - {b^2}}}{{{c^2} + {a^2}}}$$   + $$\frac{{m - {c^2}}}{{{a^2} + {b^2}}}$$   = 3, then the value of m is?
  1.    a2 + b2
  2.    a2 + b2 + c2
  3.    a2 - b2 - c2
  4.    a2 + b2 - c2
Answer: Option B
Question 5. If $$2 + x\sqrt 3 $$   = $$\frac{1}{{2 + \sqrt 3 }}{\text{,}}$$   then the simplest value of x is?
  1.    1
  2.    -2
  3.    2
  4.    -1
Answer: Option D
Question 6. If m = -4, n = -2,then the value of m3 - 3m2 + 3m + 3n + 3n2 + n3 is?
  1.    124
  2.    -124
  3.    126
  4.    -126
Answer: Option D

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