Consider the numbers 13,16,27 and 41.
A. Which of these numbers are prime? How do you know?
B. Which of these numbers are composite? How do you know?
A. The numbers 13 and 41 are both prime. This is because they are only divisible by 1 and themselves.
B. The numbers 16 and 27 are composite. This is because they have factors other than 1 and themselves. For instance, 16 can be divided evenly by 2, 4, and 8, while 27 can be divided evenly by 3 and 9.