2. Questions Bank
  3. 8th Class
  4. Mathematics
  5. Linear Equations in One Variable

8th Class Mathematics Linear Equations in One Variable Question Bank Linear Equations in one Variable

  • question_answer
    In the set of three consecutive natural numbers, the sum of the last two numbers is equal to the three times the first number. Find the sum of all the three numbers

    A)  12

    B)  14            

    C)  16                               

    D)  18

    Correct Answer: A

    Solution :

    (a): Let three nos. be (a-1), a, (a +1) \[\therefore a+\left( a+1 \right)-3\left( a-1 \right)\] \[\Rightarrow 2a+1=3a-3\] \[\Rightarrow 4-a\] \[\Rightarrow sum=12\]                          


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