Checking understanding of prime numbers | Maths | Quizalize & Oak National Academy

Starter quiz

The ______ of two factors gives a multiple.
- 'product' ✓
Which of the following is not a factor pair of 72?
- 9 × 8
- 12 × 6
- 3 × 24
- 2 × 37 ✓
Which factor is missing from the Venn diagram?
- '7' ✓
Which of the following is not a common factor of 24 and 32?
- 4
- 8
- 12 ✓
- 16 ✓
Which of the following is not true of the Venn diagram?
- 5, 10, 15 and 30 are factors of 30 but not 18
- The common factors of 18 and 30 are all factors of 6
- 30 has more factors than 18
- 9 is a common factor of 18 and 30 ✓
How many factors does 13 have?
- '2' ✓

Fill in the missing word from this sentence: A prime number has exactly ______ factors.
- '2' ✓
Which of the following arrays shows that 9 is not a prime number?
Which of the following is not a prime number?
- 3
- 17
- 21 ✓
- 37
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 $3 \times 17$ ✓
True or false? All numbers ending in 3 are prime numbers.
- True, because 3, 13 and 23 are prime numbers.
- False, 33 ends in a 3, but it has 2 factor pairs. ✓
Which number is the odd one out in this list? 43, 53, 63, 73
- 43
- 53
- 63 ✓
- 73

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1 is a prime number

1 is not a prime number as it only has one factor and a prime number has exactly two factors.