It is: 1, 11, 21, 31, 41, 51, 61, 71, 81, and 91.
After 5, all prime numbers end with 1, 3, 7 or 9.
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.
They can end with 1, 2, 3, 7 or 9.
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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.
10 of them.
There are an infinite amount of prime numbers, as numbers never end. Prime numbers are numbers that are only divisible by 1 and itself. For example, 2, 3, 5, 53, and 97 are prime numbers.
There are five of them.
11,31,41
83
Odd numbers end in 1, 3, 5, 7 or 9. Prime numbers have only two factors. 47 is an odd prime number.
an infinate amount. as numbers excell to infinity (and beyond ;) ) which is an inexplicable number, it would be simply impossible to count how many prime numbers emd in a 1