No, not every two-digit multiple of six is next to a Prime number. A multiple of six will always be an even number, divisible by both 2 and 3. Prime numbers, on the other hand, are only divisible by 1 and themselves. Therefore, there will be even numbers that are multiples of six that are not next to prime numbers.
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Every 9-digit combination of those numbers is a multiple of 3. None of them will be prime.
yep e.g 18 and 17,,, 24 and 23...... :(
9797 is the largest two digit prime number.
You can check this in any list of prime numbers. The answer is yes. Note that this doesn't apply to larger numbers.
Because if they were even they would be a multiple of 2 and thus not prime.