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Checking understanding of prime numbers

Quiz by Oak National Academy: KS3 Maths (2)

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6 questions
Show answers
  • Q1
    Fill in the missing word from this sentence: A prime number has exactly ______ factors.
    Users enter free text
    Type an Answer
    30s
  • Q2
    Which of the following arrays shows that 9 is not a prime number?
    Answer Image
    Answer Image
    Answer Image
    30s
  • Q3
    Which of the following is not a prime number?
    21
    17
    37
    3
    30s
  • Q4
    True or false? 51 is a prime number.
    True, you can't divide it by 2, 5, 7 or 10.
    False, it has more than 2 factors: 1 \times 51 and 3 \times 17
    30s
  • Q5
    True or false? All numbers ending in 3 are prime numbers.
    False, 33 ends in a 3, but it has 2 factor pairs.
    True, because 3, 13 and 23 are prime numbers.
    30s
  • Q6
    Which number is the odd one out in this list? 43, 53, 63, 73
    63
    73
    43
    53
    30s

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