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Give three pairs of prime numbers whose...

Give three pairs of prime numbers whose difference is 2.[Remark : Two prime numbers whose difference is 2 are called twin primes]

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`Solution`: Three pairs of prime numbers whose difference is 2 are `(5, 7)`, `(11, 13)` and `(17, 19)`.
Here is explanation:
Three pairs of prime numbers whose difference is `2` are:
a) `5, 7`
...
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Knowledge Check

  • A prime number

    A
    Is not a positive integer.
    B
    Has no divisor at all.
    C
    Has only 1 and itself as divisors.
    D
    Has more than two divisors.

  • A prime number is

    A
    an even number
    B
    an odd number
    C
    a composite number
    D
    None of these

  • The LCM of two co-prime numbers is their .

    A
    Sum
    B
    Difference
    C
    Product
    D
    Quotient

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