8th Class Mathematics Related to Competitive Exam Question Bank Mathematical Operations

  • question_answer
    DIRECTIONS: In the following questions, the symbols, \[\text{+ and  }\!\!\times\!\!\text{ ,4 and 6}\], \[\text{+ and  }\!\!\times\!\!\text{ ,4 and 6}\], =, * and \[4+12=16\] are used with the following meanings ?A \[16=16,\] B? means ?A is greater than B?; ?A \[4\times 6-2=14\]B? means ?A greater than or equal to B?; ?A = B? means ?A is equal to B?; ?A * B? means ?A is smaller than B?; ?A \[\times \text{to }\div ,2\text{and}4\]B? means ?A is either smaller than or equal to B?; Now in each of the following questions, assuming the given statements to be true, find which of the two conclusions I and II given below them is/are definitely true. Statement:    E \[\times to-,2and6\]U, C * E, C\[\div and\times ,2and6\]B Conclusion:  I. U = C II. E \[\times to-,2and3\] B

    A) if only if conclusion I is true

    B) if only conclusion II is true

    C) if either I or II is true

    D) if neither I nor II is true

    Correct Answer: B

    Solution :

        Given statements \[\Rightarrow \] Relation between U and C: \[q\Delta r\]\[q\times r\] no definite conclusion. So, I is not true. II. Relation between E and B: \[16-8\div 4+5\times 2=8\]\[\div \]\[\times \]i.e. \[-\] So, II is true.


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