Simplification Practice Question and Answer

Q:

Find the conjugate of (1 + i)

520 0

  • 1
    -2 + 2i
    Correct
    Wrong
  • 2
    -2 – 2i
    Correct
    Wrong
  • 3
    1 - i
    Correct
    Wrong
  • 4
    1 – 3i
    Correct
    Wrong
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Answer : 2. "-2 – 2i "

Q:

  $$25\% \ of (50\% \ of \ 30\% \ of \ 150)\over 40\% of \ 2250$$ is equal to:

517 0

  • 1
    0.625%
    Correct
    Wrong
  • 2
    0.225%
    Correct
    Wrong
  • 3
    0.825%
    Correct
    Wrong
  • 4
    0.25%
    Correct
    Wrong
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Answer : 1. "0.625%"

Q:

If a + b + c = 2, a² + b² + c² = 26 then the value of a³ + b³ + c³ – 3abc is

509 0

  • 1
    71
    Correct
    Wrong
  • 2
    74
    Correct
    Wrong
  • 3
    69
    Correct
    Wrong
  • 4
    78
    Correct
    Wrong
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Answer : 2. "74"

Q:

If $${{k^2}\over {k^2-2k+1}}={1\over 6}$$, then what is the value of $${1\over k^3}+k3$$ ?

504 0

  • 1
    472
    Correct
    Wrong
  • 2
    492
    Correct
    Wrong
  • 3
    512
    Correct
    Wrong
  • 4
    488
    Correct
    Wrong
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Answer : 4. "488 "

Q:

(0.85 % of 405 ) + (2.25 % of 550 )=?

485 0

  • 1
    16.7175
    Correct
    Wrong
  • 2
    15.7150
    Correct
    Wrong
  • 3
    13.8175
    Correct
    Wrong
  • 4
    14.7125
    Correct
    Wrong
  • 5
    None of these
    Correct
    Wrong
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Answer : 5. "None of these "

Q:

$${\sqrt{4×?}}={160\over 10}$$

484 0

  • 1
    64
    Correct
    Wrong
  • 2
    60
    Correct
    Wrong
  • 3
    68
    Correct
    Wrong
  • 4
    56
    Correct
    Wrong
  • 5
    72
    Correct
    Wrong
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Answer : 1. "64"

Q:

What is the value of $${{0.6}÷{0.6}×{0.6}+{0.5}×{0.5}÷{0.5}\over{0.6}×{0.5}+{0.3}}$$ ?

484 0

  • 1
    $${{10}\over{7}}$$
    Correct
    Wrong
  • 2
    $${{11}\over{6}}$$
    Correct
    Wrong
  • 3
    $${{7}\over{3}}$$
    Correct
    Wrong
  • 4
    $${{13}\over{6}}$$
    Correct
    Wrong
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Answer : 2. "$${{11}\over{6}}$$"

Q:

Find the value of

 sin4300 + cos4300 – sin250cos650-sin650cos250

481 0

  • 1
    $$-{3\over 8} $$
    Correct
    Wrong
  • 2
    0
    Correct
    Wrong
  • 3
    $${5\over 8} $$
    Correct
    Wrong
  • 4
    $${13\over 8} $$
    Correct
    Wrong
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Answer : 1. "$$-{3\over 8} $$"

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