0
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.
What else can I help you with?
Related Questions
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?
31
Which is a prime number 91 51 31 21?
31
Which number is prime 91 51 31 21?
31
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
Trending Questions
What are the 4M's of producing high value vegetables?
How can oil and water be effectively mixed together?
What does a fanny reducing machine look like?
Why are most amphibians unable to tolerate living in desert biomes?
What has the author Charles Owen Spettigue written?
What is the best medication for ED?
What is the Prime mover to protract and hold the scapula against the thorax wall the boxer's muscle?
What science do doctors use?
When did Brunhilde Hendrix die?
How would you use human features in a sentence?
Which organizational pattern is used in this paragraph?
If the diameter of a sphere is doubled its surface becomes?
How much automatic transmission fluid is needed in Mercedes e200 kompressor?
What is it like to live in Phoenix AZ?
Are dogs allowed on cleethorpes beach?
Where are the legendary Pokémon on Pokémon emerald?
Which aqueous solution, among those listed, has the highest boiling point?
How old do you have to be to emancipate from your parents?
What gucci mane song says red laces red bracelet fed cases?
What type of fingerprints are more likely to be found pressed in soft wax?
Copyright ©2026 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.