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Earn +20 ptsQ: What is the only palindromic prime number with an even number of digits?
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Are there any palindromic primes with an even number of digits greater than 11?
No, 11 is the only palindromic prime with an even number of digits.
What is the smallest digits prime number?
It is 2 which also is the only even prime number
You are a prime number you have two digits The sum of your digits are 17 what number are you?
The only two digit numbers whose digits add up to 17 are 89 and 98. Since 98 is an even number, 89 is prime.
Is 518 a composite number or a prime number?
It is composite, as are all whole numbers whose last digits are even.
What is the sum of all palindromic primes less than 50?
The two-digit primes less than 50 are 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, and 47. For each prime on this list whose tens digit is odd, check whether or not the number formed when the digits are reversed is also prime. (Note that if the tens digit is even, then the ``reversed'' number is even and hence not prime.) The palindromic primes less than 50 are 11, 13, 17, 31, and 37, whose sum is 109.
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