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7th Class Mathematics Simple Equations Question Bank Simple Equations

  • question_answer
    Guru is 20 years older than his son. If the sum of their ages is 50 years, how old is his son?

    A)  5 years                

    B)         10 years

    C)  15 years               

    D)         20 years

    Correct Answer: C

    Solution :

     Let the age of the son be 'x' years. So the age of Guru is \[x+20\]years. Given sum of the ages of Guru and his son= 50 years \[\Rightarrow \]               \[x+x+20=50\] \[\Rightarrow \]               \[2x=50-20\Rightarrow x=15\]


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