7th Class Mathematics Related to Competitive Exam Question Bank Mathematical Operations

  • question_answer
    DIRECTIONS: Below are given some symbols indicating some relations given against them Read these symbols carefully and then answer the questions given below. There are four options to each question, of which only one is correct. Find the correct answer. \[\Delta =\]greater than;          \[+=\]not greater than \[\theta =\] equal to;               \[\phi =\]not equal to \[\times =\] less than,              \[\square \,=\]not less than \[a\,\Delta \,b\,\Delta \,c\]does not imply

    A)  \[b+a\,\Delta \,c\]                  

    B)  \[b\,\Delta \,a\,\theta \,c\]

    C)  \[c+b\,\phi \,a\]                      

    D)  \[c+b\times a\]

    Correct Answer: B

    Solution :

        Note that in this question we have to determine which relation is not possible. It is given that a > b > c. Both relation in (a), (c) and (d) are possible. It is only (b) in which b = c is not true. Hence (b) is the answer. [It should be noted that in case of negation of implication it is enough to show that just one relation is not possible.]


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