 |  Playing with Numbers 20 Flashcards |  Start |
 | What is a prime number? |  Card: 1 / 20 |
| A prime number is a number greater than 1 that has exactly two factors: 1 and itself. | Card: 2 / 20 |
| True or False: Every number is a multiple of 1. | Card: 3 / 20 |
| True | Card: 4 / 20 |
| What is the Highest Common Factor (HCF) of 36 and 48? | Card: 5 / 20 |
| The HCF of 36 and 48 is 12. | Card: 6 / 20 |
| Fill in the blank: The sum of the factors of 6, excluding itself, equals ___. | Card: 7 / 20 |
| 6 | Card: 8 / 20 |
| What is the definition of a composite number? | Card: 9 / 20 |
| A composite number is a number greater than 1 that has more than two factors. | Card: 10 / 20 |
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| True or False: 1 is classified as a prime number. | Card: 11 / 20 |
| False; 1 is neither prime nor composite. | Card: 12 / 20 |
| What is the prime factorization of 60? | Card: 13 / 20 |
| 2² × 3 × 5 | Card: 14 / 20 |
| Fill in the blank: A perfect number is equal to the sum of its factors excluding ___. | Card: 15 / 20 |
| Itself | Card: 16 / 20 |
| What is the common factor of 18 and 24? | Card: 17 / 20 |
| The common factors are 1, 2, 3, and 6. | Card: 18 / 20 |
| True or False: All multiples of a number are less than that number. | Card: 19 / 20 |
| False; all multiples of a number are equal to or greater than that number. | Card: 20 / 20 |
| Completed! Keep practicing to master all of them. |  Restart |
