Respuesta :
Prime numbers are those that cannot be divided by another number (other than themselves and 1). In other words, prime numbers have factors of themselves and 1.
For example, 3 is a prime number because its only factors are 3 and 1.
6 is not a prime number because it can be factored to 3*2.
Therefore, the correct answer is c. 3,11,23,31
For example, 3 is a prime number because its only factors are 3 and 1.
6 is not a prime number because it can be factored to 3*2.
Therefore, the correct answer is c. 3,11,23,31
Prime numbers can only be divided by 1 and itself.
First group:- It contains 15, and 15 can be divided by 3 and 5 to get a whole number.
Second group:- 49 can be divided by 7 to receive 7. So this is wrong.
Third group:- This group can be considered all prime numbers, so this is correct.
Fourth group:- Incorrect. Because 9/3 = 3
Answer:- c. 3,11,23,31 are all prime numbers.
First group:- It contains 15, and 15 can be divided by 3 and 5 to get a whole number.
Second group:- 49 can be divided by 7 to receive 7. So this is wrong.
Third group:- This group can be considered all prime numbers, so this is correct.
Fourth group:- Incorrect. Because 9/3 = 3
Answer:- c. 3,11,23,31 are all prime numbers.
