Aptitude Practice Question and Answer

Q:

If $$ {x+3y-{2z\over 4}}=6$$ , $$ {x+{2\over 3}}(2y+3z)=33$$ and $$ {1\over 7}{(x+y+z)+2z=9}$$, then what is the value of $$ {46x+131y}$$?

3387 0

  • 1
    364
    Correct
    Wrong
  • 2
    414
    Correct
    Wrong
  • 3
    384
    Correct
    Wrong
  • 4
    464
    Correct
    Wrong
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Answer : 2. "414"

Q:

$${3x+4y-2z+9=17},{7x+2y+11z+8=23}$$ and $$ {5x+9y+6z-4=18}$$ then what is  the value of $$ {x+y+z-34}$$?

1072 0

  • 1
    -45
    Correct
    Wrong
  • 2
    -31
    Correct
    Wrong
  • 3
    -14
    Correct
    Wrong
  • 4
    -28
    Correct
    Wrong
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Answer : 2. "-31"

Q:

If $${a+b=10}$$ and $$ \sqrt{a\over b}-13=-\sqrt{b\over a}-11$$, then what is the value of $${3ab+4a^2+5b^2}$$?

773 0

  • 1
    300
    Correct
    Wrong
  • 2
    600
    Correct
    Wrong
  • 3
    750
    Correct
    Wrong
  • 4
    450
    Correct
    Wrong
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Answer : 1. "300"

Q:

If $$ {3\sqrt{{1-a}\over{a}}}+9={19-3\sqrt{{a}\over{1-a}}}$$, then what is the value of a?

892 0

  • 1
    $${3\over10},{7\over10}$$
    Correct
    Wrong
  • 2
    $${1\over10},{9\over10}$$
    Correct
    Wrong
  • 3
    $${2\over5},{3\over5}$$
    Correct
    Wrong
  • 4
    $${1\over5},{4\over5}$$
    Correct
    Wrong
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Answer : 2. "$${1\over10},{9\over10}$$"

Q:

If $$ {a^4+1}={{a^2}\over{b^2}}{(4b^2-b^4-1)}$$,then what is the value of $${a^4+b^4}$$?

861 0

  • 1
    16
    Correct
    Wrong
  • 2
    2
    Correct
    Wrong
  • 3
    32
    Correct
    Wrong
  • 4
    64
    Correct
    Wrong
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Answer : 2. "2"

Q:

If $$ {x^2-12x+33=0}$$, then what is the value of $${(x-4)^2+[{1\over({x-4})^2}}]$$.

852 0

  • 1
    16
    Correct
    Wrong
  • 2
    18
    Correct
    Wrong
  • 3
    20
    Correct
    Wrong
  • 4
    14
    Correct
    Wrong
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Answer : 4. "14"

Q:

If one root of the equation $$ {Ax^2+Bx+C=0}$$ is two and a half times the others, then which of the following is True?

905 0

  • 1
    $$ {7B^2=3CA}$$
    Correct
    Wrong
  • 2
    $$ {7B^2=4CA}$$
    Correct
    Wrong
  • 3
    $$ {7B^2=36CA}$$
    Correct
    Wrong
  • 4
    $$ {10B^2=49CA}$$
    Correct
    Wrong
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Answer : 4. "$$ {10B^2=49CA}$$"

Q:

If α and β are the roots of equation $$ {x^2-2x+4=0}$$, then what is the equation whose roots are ${α^3}\over{β^2}$$ and $${β^3}\over{α^2}$$.

859 0

  • 1
    $$ {x^2-4x+8=0}$$
    Correct
    Wrong
  • 2
    $$ {x^2-32x+4=0}$$
    Correct
    Wrong
  • 3
    $$ {x^2-2x+4=0}$$
    Correct
    Wrong
  • 4
    $$ {x^2-16x+4=0}$$
    Correct
    Wrong
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Answer : 3. "$$ {x^2-2x+4=0}$$"

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