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  5. Operations on Numbers

5th Class Mathematics Operations on Numbers Question Bank Operations on Numbers

  • question_answer
    Each digit 1, 2, 3, 4, 5, 6, 7, 8 and 9 is represented by a different letter A, B, C, D, E, F, 6. H and I but not necessarily in that order. Further each of A + B + C, C + D - E, E + F + G and G + H + I is equal to 13. What is the sum of C, E and G?

    A) 7        

    B) 9

    C) 11                                  

    D) Cannot be determined

    Correct Answer: A

    Solution :

    A + B + C = 13 C + D + E = 13 E + F + G = 13 G + H + I = 13 Adding these equations, (A +B +C + D + E + F + G + H + I) + (C + D + E) =52 (1 + 2 + 3 + 4 + 5 ++6 + 7 + 8 + 9) + (C + D + E) = 52 C + D + E = 52 - 45 = 7                         


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