Which number is prime out of 91 51 31 21?

Anonymous

∙ 12y ago

Updated: 8/17/2019

21 is divisible by 3 and 7, so it is composite. 91 is divisible by 7 and 13, so it is composite. 51 is divisible by 3 and 17. 31 is divisible by only 1 and itself, so it is the Prime number.

Wiki User

∙ 12y ago

What else can I help you with?

Which of 21 31 51 and 91 is a prime number?

31 is a prime number.

Which number is a prime 91 51 31 or 21?

Which is a prime number 91 51 31 21?

Which number is prime 91 51 31 21?

What number is a prime number 91 51 31 21?

31 is the only one that has only two factors: 1 and itself. It is the prime number.

Which is not a prime number 17 23 31 or 51?

51 is not a prime number: 3x17=51

What is a prime number 17 23 31 51?

51 is composite number

Which number is a prime number a.91 b.51 c.31 d. 21?

91 = 13*751 = 17*321 = 3*731 is prime. â– 

Which number is a composite number 51 41 31 11?

51 is composite.

Are 31 and 51 prime numbers?

31 is prime, but 51 is not as 51=3*17.

Are 40 and 51 relativly prime?

51 is not a prime number. It is divisible by 3.

Which is not a prime number between 17 23 31 and 51?

51 = 3 x 17