Which of these are a prime numbers?, 2 , 4, 6, Which of these are a prime numbers?, 21, 61, 51, Which of these are a prime numbers?, 9, 3, 6, Which of these are a factor of 50?, 25, 6, 30, 12, Which of these are a factor of 5?, 2, 3, 1, Which of these are a factor of 67?, 33, 34, 35, None, Which of these is not a square number?, 121, 144, 132, Which of these is a square number?, 4, 5, 6, Which of these is not a square number? , 20, 25, 36, Which of these are a multiple of 1?, 56, 15, 67, All of the above, Which of these are a multiple of 3?, 33, 21 , 86, Which of these are not multiple of 7?, 14, 37, 28.

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