Question

Warm-up: Prime Numbers

Prime numbers are numbers that have only two factors:
the number itself, and 1.
Some examples are 2, 3, 5, and 7.
2 is prime because it only has two factors: 1 and 2
3 is prime because it only has two factors: 1 and 3
5 is prime because it only has two factors: 1 and 5
7 is prime because it only has two factors: 1 and 7
Think of two other Prime numbers and put them in
the box below (hint: there are 4 prime numbers
between 10 and 20)
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Answer 1

Explanation:

11 is a prime number. It cannot be divided by any other whole integer but itself (11) and 1.

13 is a prime number. It cannot be divided by any other whole integer but itself (13) and 1.

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15 is not prime. It can be divided by 1 3 5 and 15.

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17 and 19 are both prime.