Best Answer

If it is 5 it is a prime. If it is any other positive integer ending in 5 it is a composite.

User Avatar

Wiki User

โˆ™ 2014-03-10 21:13:57
This answer is:
User Avatar
Study guides

What is the prime factorization of 24

What is the prime factorization of 54

What is the prime factorization of 64

What is the prime factorization of 34

See all cards
12 Reviews

Add your answer:

Earn +20 pts
Q: How can you tell without any calculations whether a number ending in 5 is a prime or composites number?
Write your answer...
Still have questions?
magnify glass
Related questions

What is the plural of trout without ending with s?


Did Randy Travis sing a song with these lyrics its a love without ending amen?

Did Randy Travis sing a song with these lyrics...its a love without ending, amen.

What are words ending in the letters ETHER?

Nether, altogether, together, untether, tether, whether.

What extends without ending and has no thickness?

A line or a plane.

Why was the Civil War a war for freedom?

Whether or not it was a war about slavery (debatable), it did result in the ending of slavery.

One of Wilson's ideas for ending the war?

"Peace without victory"

What is the meaning of euthanasia help?

Euthanasia is the ending of a life because of pain, illness, or immense suffering. It can can refer to "assisted suicide" (voluntary) or the ending of a life without the person's consent (active). It refers to either humans or animals. Euthanasia of humans is illegal in many parts of the world and there is much debate of whether it is murder or not.

What are the release dates for A Path for Hope Ending Juvenile Life Without Parole - 2013?

A Path for Hope Ending Juvenile Life Without Parole - 2013 was released on: USA: 5 February 2013

If the results of long division repeat without ending the guotient is a?

It is a repeating decimal.

Does an athlete ever have season ending surgery without going on injured reserve?


How can you save the earth from ending?

Opinion: No one really has enough power to save the Earth from ending if that is its fate. Whether it is by meteorite, hurling into (or away from) the sun, enormous implosion or explosion, its size alone dwarfs many, if not all, actions humankind makes, whether good or bad.

How do you make conference call from action voip?

Initiate a call with one person, and call the second person without ending the first call. It will ask for whether you need the first call to hold or conference call. Opt for the conference call.

People also asked