7th Class Mental Ability Numbers Question Bank

done Number System Total Questions - 20

• question_answer1)
  The additive inverse of - 45 is which of the following?
  A)
  45    done clear
  B)
  -45 done clear
  C)
  0                      done clear
  D)
  1 done clear
  E)
  None of these done clear
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• question_answer2)
  The value of \[\left( -\mathbf{16} \right)~\,\,\times \,\,\left( -\mathbf{3} \right)\,\,\times \,\,~\left( -\mathbf{15} \right)\]is which of the following?
  A)
  -720      done clear
  B)
    720 done clear
  C)
  540                done clear
  D)
  -540 done clear
  E)
  None of these done clear
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• question_answer3)
  Which of the following is the value of \[\left( -\mathbf{3} \right)~\times \left[ \left( -\mathbf{5} \right)\text{ }+\text{ }\left( -\mathbf{7} \right) \right]\]?
  A)
  -36      done clear
  B)
                            36         done clear
  C)
  22                      done clear
  D)
  -22 done clear
  E)
  None of these done clear
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• question_answer4)
  The difference of additive inverse of -35 and multiplicative inverse of \[\frac{\mathbf{1}}{\mathbf{-27}}\] is which of the following?
  A)
  62                   done clear
  B)
  -8 done clear
  C)
  8                      done clear
  D)
  -62 done clear
  E)
  None of these done clear
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• question_answer5)
  The value of is \[\frac{\mathbf{3\times [-5-9]}}{\mathbf{[(-7)-(-5)]}}\]
  A)
  -21                    done clear
  B)
    21 done clear
  C)
  \[\frac{7}{2}\]                   done clear
  D)
    \[\frac{-7}{2}\]         done clear
  E)
                                     None of these done clear
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• question_answer6)
  The reciprocal of a negative rational number
  A)
  is a positive rational number done clear
  B)
  is a negative rational number done clear
  C)
  can be either a positive or a negative rational number done clear
  D)
  does not exist done clear
  E)
  None of these done clear
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• question_answer7)
  When \[\frac{\mathbf{5}}{\mathbf{8}}\] is expressed as a decimal to
  A)
  0.125     done clear
  B)
                0.850 done clear
  C)
  0.625                  done clear
  D)
    1.25 done clear
  E)
  None of these done clear
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• question_answer8)
  If \[\frac{\mathbf{16}\mathbf{.75}}{\mathbf{48}\mathbf{.97}}\,\,\mathbf{\times }\,\,\left( \frac{\mathbf{1}}{\mathbf{x}} \right)\,\,\mathbf{=}\,\,\frac{\mathbf{0}\mathbf{.1675}}{\mathbf{4}\mathbf{.897}}\], then x equal to
  A)
  0.01                   done clear
  B)
    0.1 done clear
  C)
  10    done clear
  D)
    100 done clear
  E)
  None of these done clear
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• question_answer9)
  A monkey jump 5 yards every second on a 60 yards vertical pole and then falls down 2 yards over the next second. How many seconds will it take to climb the pole?
  A)
  12                    done clear
  B)
    39 done clear
  C)
  40                    done clear
  D)
    30 done clear
  E)
  None of these done clear
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• question_answer10)
  The value which is to be replaced by y in the following expression \[\mathbf{2}\frac{\mathbf{1}}{\mathbf{3}}\,\,\mathbf{+}\,\,\mathbf{y}\,\,\mathbf{+}\,\,\mathbf{3}\frac{\mathbf{1}}{\mathbf{6}}\,\,\mathbf{+}\,\,\mathbf{4}\frac{\mathbf{1}}{\mathbf{2}}\,\,\mathbf{=}\,\,\mathbf{13}\frac{\mathbf{2}}{\mathbf{5}}\]
  A)
  \[3\frac{1}{6}\]               done clear
  B)
    \[4\frac{2}{3}\] done clear
  C)
  \[2\frac{1}{3}\]              done clear
  D)
    \[3\frac{2}{5}\] done clear
  E)
  None of these done clear
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• question_answer11)
  A container is filled with a liquid up to \[\frac{\mathbf{4}}{\mathbf{5}}\]th of its volume. When 6 bottles of liquid are taken out and four bottles of liquid are poured back into it. It is \[\frac{\mathbf{3}}{\mathbf{4}}\]th of the volume. Find the number of bottles of liquid in the container when the container is full.
  A)
  15                    done clear
  B)
    40 done clear
  C)
  39                  done clear
  D)
    33 done clear
  E)
  None of these done clear
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• question_answer12)
  Peter has a rod such that \[\frac{\mathbf{1}}{\mathbf{8}}\]m of it is yellow, \[\frac{\mathbf{1}}{\mathbf{2}}\]m of the remaining is green and \[\mathbf{3}\frac{\mathbf{1}}{\mathbf{2}}\] m of the remaining is white: The length of rod is which of the following?
  A)
  8 m        done clear
  B)
    4 m done clear
  C)
  3 m                   done clear
  D)
    7 m done clear
  E)
  None of these done clear
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• question_answer13)
  If \[\frac{\mathbf{37}}{\mathbf{13}}\mathbf{=2+}\frac{\mathbf{1}}{\mathbf{a+}\frac{\mathbf{1}}{\mathbf{b+}\frac{\mathbf{1}}{\mathbf{c}}}}\]where a, b, c are natural numbers then the value of a, b and c are which of the following?
  A)
  1, 5, 3                done clear
  B)
    1, 3, 5 done clear
  C)
  1, 5, 2    done clear
  D)
    1, 2, 5 done clear
  E)
  None of these done clear
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• question_answer14)
  The value of \[\frac{\mathbf{1}}{\mathbf{3+}\frac{\mathbf{1}}{\mathbf{3+}\frac{\mathbf{1}}{\mathbf{3-}\frac{\mathbf{1}}{\mathbf{3}}}}}\] is which of the following?
  A)
  \[\frac{8}{27}\]              done clear
  B)
    \[\frac{27}{89}\] done clear
  C)
  \[\frac{3}{24}\]              done clear
  D)
    \[\frac{9}{25}\] done clear
  E)
  None of these done clear
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• question_answer15)
  Convert the following number into percentage. \[\frac{\mathbf{0}\mathbf{.35}\,\,\mathbf{\times }\,\,\mathbf{0}\mathbf{.0015}}{\mathbf{0}\mathbf{.25}\,\,\mathbf{\times }\,\,\mathbf{0}\mathbf{.07}}\]
  A)
  \[0.3~\]%         done clear
  B)
  \[3\]% done clear
  C)
  \[30\]%            done clear
  D)
  \[90\,\]% done clear
  E)
  None of these done clear
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• question_answer16)
  If \[{{(-24)}^{-1}}\] is divided by \[({{3}^{-1}})\] then the quotient will be as following.
  A)
  \[\frac{-1}{8}\]  done clear
  B)
  (-8) done clear
  C)
  8                      done clear
  D)
  \[\frac{1}{8}\] done clear
  E)
  None of these done clear
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• question_answer17)
  Simplify \[{{\left[ {{\mathbf{7}}^{\mathbf{-1}}}\mathbf{+}{{\left( \frac{\mathbf{3}}{\mathbf{2}} \right)}^{\mathbf{-1}}} \right]}^{\mathbf{-1}}}\mathbf{\div }{{\left[ {{\mathbf{6}}^{\mathbf{-1}}}\mathbf{+}{{\left( \frac{\mathbf{3}}{\mathbf{2}} \right)}^{\mathbf{-1}}} \right]}^{\mathbf{-1}}}\]
  A)
  \[\frac{34}{35}\]                        done clear
  B)
    \[\frac{35}{34}\] done clear
  C)
  \[\frac{21}{105}\]          done clear
  D)
    \[\frac{5}{121}\] done clear
  E)
  None of these done clear
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• question_answer18)
  Stephen has three boxes whose total weight is \[\frac{\mathbf{121}}{\mathbf{2}}\] pound. If the first box weight is \[\mathbf{3}\frac{\mathbf{1}}{\mathbf{2}}\] pound more than the second box and third   box weight \[\mathbf{5}\frac{\mathbf{1}}{\mathbf{3}}\] pound more than the first box, then the weight of second box is ________
  A)
  \[\frac{289}{18}\,\,Pound\]         done clear
  B)
  \[\frac{18}{289}\,\,Pound\] done clear
  C)
  \[\frac{279}{18}\,\,Pound\]         done clear
  D)
    \[\frac{18}{279}\,\,Pound\] done clear
  E)
              None of these done clear
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• question_answer19)
  The height of a triangle is three fifth of it corresponding base. If the height increased by 4% and base decreased by 2% then area of triangle remains same. The base of triangle is:
  A)
  \[\frac{43}{3}\,\,cm\]     done clear
  B)
                \[\frac{33}{15}\,\,cm\] done clear
  C)
  Cannot be determined done clear
  D)
  \[\frac{15}{3}\,\,cm\] done clear
  E)
  None of these done clear
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• question_answer20)
  The perimeter is rectangle is \[\mathbf{3}\frac{\mathbf{1}}{\mathbf{3}}\]more than the perimeter of square. A triangle whose perimeter is \[\frac{\mathbf{1}}{\mathbf{3}}\] times of the circumference of the circle whose radius is 5 cm and is equal to the length of sides of the square. Find the perimeter of rectangle is:
  A)
  \[23.\overline{3}\,\,\] done clear
  B)
    \[15\frac{1}{3}\] done clear
  C)
  \[15\frac{1}{9}\]            done clear
  D)
    \[25\frac{1}{9}\] done clear
  E)
  None of these done clear
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