6th Class Mathematics Knowing our Numbers Question Bank Number System

  • question_answer
    DIRECTIONS: Read the passage(s) given below and answer the questions that follow. Passage-1 (i)   Natural numbers having exact two distinct factors i.e., 1 and the number itself are called prime numbers. (ii) Natural numbers having more than two factors are called composite numbers. If p is a prime number such that (p + 2) is also a prime number, then p(p + 2) + 1 is always

    A)  a prime number

    B)  an odd integer

    C)  not a perfect square

    D)  a perfect square

    Correct Answer: D

    Solution :

         a perfect square


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