Across
- 4. : The number of prime numbers between 1 and 10
- 6. : A number which can only be divided exactly by itself and 1
- 7. : The only even prime number
- 8. : The fourth prime number
Down
- 1. : The set of the numbers that can be divided exactly into another number
- 2. : A number with more than 2 factors
- 3. : All the numbers in a multiplication table
- 5. : Not a prime number or a composite number