9th Class Mathematics Number System and its Operations Question Bank

done Number System Total Questions - 10

• question_answer1)
  The LCM of two numbers is 280 and their ratio is \[7:8\]. The    numbers
  A)
  70, 80          done clear
  B)
                     54, 68 done clear
  C)
  35, 40        done clear
  D)
         28, 36 done clear
  E)
   None of these done clear
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• question_answer2)
  Three persons start walking together and their steps measure 40 cm, 42 cm and 45 cm respectively. What is the minimum distance each should walk so that each can cover the same distance in complete steps?
  A)
  25 m 20 cm    done clear
  B)
         50 m 40 cm done clear
  C)
  75 m 60 cm         done clear
  D)
         100 m 80 cm done clear
  E)
   None of these done clear
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• question_answer3)
  A man plants 15376 apple trees in his garden and arranges them so that there are as many rows as there are apples trees in each row. The number of rows is:
  A)
  124         done clear
  B)
         126 done clear
  C)
  134                      done clear
  D)
         144 done clear
  E)
   None of these done clear
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• question_answer4)
  In a cricket match, the number of runs scored by any team is equal to power of the number of batsmen playing in the team. Six batsmen played in team A and eleven batsmen played in team B. If team A won by 95 runs, then find the runs scored by team A.
  A)
  216        done clear
  B)
         220 done clear
  C)
  210                      done clear
  D)
        230 done clear
  E)
   None of these done clear
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• question_answer5)
  If the sum of a number and its square is 182, then what is the number?
  A)
  15                       done clear
  B)
          26 done clear
  C)
  28                        done clear
  D)
         13 done clear
  E)
   None of these done clear
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• question_answer6)
  A boy has enough money to buy 20 exercise books. If each book cost 25 paise less, he could buy two more books and still have 70 paise left. How much money had he originally?
  A)
  45                       done clear
  B)
         48 done clear
  C)
  50                         done clear
  D)
         52 done clear
  E)
   None of these done clear
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• question_answer7)
  If \[a=\frac{x}{x+y}\] and \[b=\frac{x}{x-y}\], then \[\frac{ab}{a+b}\] is equal to:
  A)
  \[\frac{xy}{{{x}^{2}}+{{y}^{2}}}\]  done clear
  B)
         \[\frac{{{x}^{2}}+{{y}^{2}}}{xy}\] done clear
  C)
  \[\frac{x}{x+y}\]                       done clear
  D)
  \[{{\left( \frac{y}{x+y} \right)}^{2}}\] done clear
  E)
  None of these done clear
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• question_answer8)
  In a family, each daughter has the same number of brothers as she has sisters and each son has twice as many sisters as he has brothers. How many sons are there in the family?
  A)
  2                         done clear
  B)
         3 done clear
  C)
  4                          done clear
  D)
        5 done clear
  E)
   None of these done clear
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• question_answer9)
  In a garden, there are 10 rows and 12 columns of mango trees. The distance between the two trees is 2 metres and a distance of one metre is left from all sides of the boundary of the garden. The length of the garden is:
  A)
  20 m                    done clear
  B)
         22 m done clear
  C)
  24 m     done clear
  D)
         26 m done clear
  E)
   None of these done clear
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• question_answer10)
  At the end of a business conference the ten people present all shake hands with each other once. How many handshakes will there be altogether?
  A)
  20 done clear
  B)
                                 45 done clear
  C)
  55                        done clear
  D)
         90 done clear
  E)
   None of these done clear
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