Question

which of the following is a prime number 81 71 91 78​

Answer 1

71 is the correct answer

If it is then mark it as brainliest answer

Answer 2

Answer:

71

Step-by-step explanation:

           From the given options  71 is a prime number . A prime number is a number that is divisible only by itself and 1 . (eg: 1,2,3,5,7,) .

here among the given options 81 is divisible by 1 , 3 ,9 &81 and 91 is divisible by 1 , 13 , 7 , & 91 and 78 is divisible by 1 , 2, 3 ,6 ,39 &78 . since  none of these numbers follow the properties of a prime number , hence these three options aren't a prime number .

But 71 is a prime number . because it is divisible only by itself and 1 .