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Q: Why no other prime numbers end in 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.

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.

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.

Related questions

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

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, all other numbers ending in 5 are divisible by 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.

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.

All of the numbers that end in 5 are multiples of 5 which means that they have more than two factors.

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

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

Two and five!

2 and 5

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