Q: How many prime numbers end on a 5?

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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.

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.

All numbers larger than 5 which end in 5 are divisible by 5 and so are not prime. All numbers larger than 2 which end in 2 are divisible by 2 and so are not prime.

After 5, all prime numbers end with 1, 3, 7 or 9.

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.

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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.

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.

All numbers that end with 5 are divisible by 5.All numbers that end with 5 are divisible by 5.All numbers that end with 5 are divisible by 5.All numbers that end with 5 are divisible by 5.

All numbers larger than 5 which end in 5 are divisible by 5 and so are not prime. All numbers larger than 2 which end in 2 are divisible by 2 and so are not prime.

No. Other than 5, no prime numbers end in 5.

After 5, all prime numbers end with 1, 3, 7 or 9.

Two and five!

5, all other numbers ending in 5 are divisible by 5.

2 and 5 are the only ones, so one each.

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.

2 and 5

Just 2 and 5