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10th Class Mathematics Real Numbers Question Bank Case Based MCQs - Real Number

  • question_answer
    Vishal has a collection of marbles realizes that if he makes a group of 2 or 3 marbles, there are always one marbles left, then which of the following is correct if the number of marbles is p?

    A) p is odd

    B) p is even

    C) can't say

    D) Both [a] and [b]

    Correct Answer: A

    Solution :

    Let the number of marbles be 2m + 1 or 3n + 1
      Total number of marbles be in the form of (multiple of 2 and 3) +1 or p = 6a + 1 [a is any integer) p is an odd number.
     


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