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4th Class Mental Ability Arithmetical Reasoning Question Bank Arithmetical Reasoning

  • question_answer
    At the end of birthday party, ten children present all shake hands with each other once. How many handshakes will there be altogether?

    A) 20                          

    B) 45          

    C) 55                          

    D) 90

    Correct Answer: B

    Solution :

    Clearly the total number of handshakes \[=\left( 9+8+7+6+5+4+3+2\text{ }+\text{ }1 \right)=45.\]


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