13, 23, 43, 53, 73, 83
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13, 23, 43, 53, 73, 83
2, 3, 5, and 7 are the only one-digit prime numbers.
non-prime no.
24 of them.
0 Look at the product of the first 3 prime numbers: 2 x 3 x 5 = 30. Any number multiplied by 30 will have a 0 in the units digit. So, no matter how many prime numbers you are multiplying, if once you have a number ending in 0, all of the rest will end in 0.
71,73,79
No. Like all numbers ending in the digit 4, it is even.
All the two digit prime numbers that can be reversed are 11, 13 and 31, 17 and 71, 37 and 73, and 79 and 97.
For a 2-digit prime number (which are all odd) to be the sum of two prime numbers, one of the prime numbers will have to be 2. That means the difference between the sum and the other addend will have to be 2. Prime numbers that differ by 2 are called twin primes. There are six pairs of 2-digit twin primes. Your numbers are 13, 19, 31, 43, 61 and 73.
Numbers that are not prime are called composite numbers. Composite numbers are integers greater than 1 that can be divided evenly by at least one other number besides 1 and itself. Examples of composite numbers include 4, 6, 8, 9, 10, and so on. These numbers have multiple factors, unlike prime numbers which only have two factors: 1 and the number itself.
Only one positive prime number has a 5 in the ones digit. That prime number is 5. All other numbers with a 5 in the ones digit are composite because they will be divisible by 5.
No. All whole numbers ending in zero are composite.