Question

wich of the following are prime number 23, 21, 25, 81​

Answer 1

Answer:

23 is prime no

Step-by-step explanation:

21= 3rd table

25=5th table

81=3rd table

so 23 is the prime number

Hope this helps you

Answer 2

Answer:

23

Step-by-step explanation:

a prime number is one that only has two factors(1 and itself)

23 divisible by only 23 and 1

21 divisible by 7 and 3, 21 and 1

25 by 5 and 5, 25 and 1

81 by 3 and 27, 9 and 9, 27 and 1

hope it helps. plz mark as brainliest.