8th Class Mathematics Related to Competitive Exam Question Bank Calendar and Clock

  • question_answer
    The last day of a century cannot be:

    A) Monday                                  

    B) Wednesday

    C) Friday         

    D) Tuesday

    Correct Answer: D

    Solution :

    100 years contain 5 odd days. So, last day of 1stcentury is 'Friday' 200 years contain \[(5\times 2)=10\] odd days = 3 odd days. So, last day of 2nd century is 'Wednesday5. 300 years contain \[(5\times 3)=15\] odd days= 1 odd day. \[\therefore \] Last day of 3rd century is 'Monday9. 400 years contain 0 odd day. \[\therefore \] Last day of 4th century is 'Sunday' Since the order is continually kept in successive cycles, we see that the last day of a century cannot be Tuesday, Thursday or Saturday.


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