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What is the HCF of two prime numbers...

What is the HCF of two prime numbers

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What is the HCF of the smallest composite number and the smallest prime number ?

Find the HCF of these numbers by prime factorisation. [A] 6,72, and 120 [B] 90 and 144 [C] 40,36,126 [D] 92 and 510 [E] 105 and 1515

Knowledge Check

  • Each prime number has:

    A
    no factor
    B
    only one factor
    C
    only two factors
    D
    more than two factors.
  • Two dice are rolled simultaneously. The probability that the sum of the two numbers ofn the dice is a prime number is

    A
    1/4
    B
    5/36
    C
    5/12
    D
    5/6
  • Two unbiased six faced dice are thrown. The probability that the sum of the numbers on faces of them is a prime number greater than 5 is

    A
    1/6
    B
    1/2
    C
    2/9
    D
    4/9
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    State the negations of : (v) Some prime numbers are odd.

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    Write the even prime number.

    Which of the following is a prime number ?

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