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# Can a prime number end in 5?

Updated: 4/28/2022

Wiki User

15y ago

5 itself is a Prime number, so if you count 5 as ending in 5 that is one prime number. Other than that any number ending in 5 would be some multiple of 5 and therefore could not be a prime number.

Wiki User

15y ago

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Q: Can a prime number end in 5?
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### What number's cant a prime number end in why?

Other than 2, no prime numbers are even. So prime numbers can't end in even numbers. After 5, no prime number can end in 5. After 5, all prime numbers end in 1, 3, 7 or 9.

### What prime number ends in a 5?

The only prime number that ends in a 5 is 5 itself. All the other positive integers that end in 5 are divisible by 5 and therefore not prime.

### Is 125 relatively prime?

To be relatively prime you must relate the number to another number. 125 is 5&sup3; so it is relatively prime to all numbers that are not multiples of 5 (do not end in 0 or 5)

### Why is 5 the only prime number that ends with 5?

because all other numbers that end with 5 are divided by 5, in which case they are not prime!

### Is 95 a prime or a composite number?

95 is not a prime. All numbers greater than 5 that end in 5 are composites numbers.Composite.

### What prime numbers end with a 2 or a 5?

The only prime number ending in a 2 or 5 is the number two itself. All others are composite.

### How don't prime numbers end in 5?

The only prime number that ends in 5 is 5. All other numbers that end in 5 are multiples of 5 and would have more than two factors.

### Is 785 prime?

No - since the number is greater than 5 and has a 5 at the end, you can tell that the number is divisible by 5 and therefore not a prime number. The positive integer factors of 785 are: 1, 5, 157, 785

### Why no other prime numbers end in 5?

Every other number that ends in 5 is a multiple of 5 this is why

### What prime numbers end in a 2 or 5?

5 and 2 are the only prime numbers that end in a 5 or 2. A prime number is by definition only divisible by 1 and itself, and all other whole numbers ending in 5 or 2 are divisible by 5 or 2, respectively. Numbers that are not whole numbers cannot be prime.

### Explain why none of the prime numbers end in a 5 except for itself?

This is because if the number ends in a five, then it inherently is divisible by 5. This means that it inherently would not be a prime number.

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