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Railways Sample Paper RRB (Group D) Sample Test Paper-1

  • question_answer
    If '+' stands for 'multiplication', '<' stands for' division', \['-'\] stands for 'subtraction', \['-'\] stands for 'addition' and \['\times '\] stands for 'greater than', identify which expression is correct.

    A)  \[20-4\div 4+8<2\times 26\]

    B)  \[20\times 8+15<5\div 9-8\]

    C)  \[20<2+10\div 4-6\times 100\]

    D) \[~20<5+25\div 10-2\times 96\]

    Correct Answer: C

    Solution :

    [c]
    \[+\Rightarrow \times \] \[<\Rightarrow \div \]
    \[-\Rightarrow +\] \[\times \Rightarrow >\] \[\div \Rightarrow -\]
    Option [a] \[20-\,4\div 4+8<2\times 26\] \[\Rightarrow 20+4-\,4\times 8\div 2>26\] \[\Rightarrow 20+4-\,4\times 4>26\] \[\Rightarrow 20-\,16>26\Rightarrow 8>26\](Not possible) Option [b] \[20\times 8+15<5\div 9-\,8\] \[\Rightarrow 20>8\times 15\div 5-\,9+8\] \[\Rightarrow 20>8\times 3-\,9+8\] \[\Rightarrow 20>24-9+8\]          \[\Rightarrow 20>23\](Not possible) Option [c] \[20<2+10\div 4-\,6\times 100\] \[\Rightarrow 20\div 2\times 10-\,4+6>100\] \[\Rightarrow 10\times 10-\,4+6>100\] \[\Rightarrow 100-\,4+6>100\] \[\Rightarrow 106-\,4>100\Rightarrow 102>100\] Option [d] \[20<5+25\div 10-\,2\times 96\] \[\Rightarrow 20\div 5\times 25-\,10+2>96\] \[\Rightarrow 4\times 25-\,10+2>96\] \[\Rightarrow 100-\,10+2>96\] \[\Rightarrow 102-\,10>96\Rightarrow 92>96\](Not possible)


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