Question

Select all the numbers that are composite.

(1 point)
Responses

11

11

21

21

31

31

41

41

51

Answer 1

A composite number is a positive integer that has at least one positive divisor other than one or itself; in other words, it has more than two distinct positive divisors.

From the numbers you provided:

- 11 is a prime number (not composite).
- 21 is composite (divisors: 1, 3, 7, 21).
- 31 is a prime number (not composite).
- 41 is a prime number (not composite).
- 51 is composite (divisors: 1, 3, 17, 51).

Therefore, the composite numbers from your list are:

- 21
- 51