This number is scary because of the bad things that happen on that day. Some people think it is just to cause panic to the world to say that 13 is an unlucky number. People stay at home all day and sometimes don't go to work. The Apollo 13 failed too so, who knows. It is just another conspiracy theory that might be solved someday or might not be.
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A number is divisible by 13 if it is a multiple of 13. In other words, 13 times a number results in a big number that is divisible by 13.
13 is not an unlucky number it is superstitious. I love the number 13
Nothing goes into 13 evenly other than 1 and 13, so that means it is a prime number.
no, it is no. the number 13 is a real number. It is not imaginary.
Thirteen = 13