The lowest common multiple of 12 and 13 is 156
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No, teen number's start with 13, and go up to 19.
Nothing goes into 13 evenly other than 1 and 13, so that means it is a prime number.
13/12 is not a whole number and so you cannot write it as a whole number.
It is (12 + 13)/2 = 25/2 = 12.5 or 12½
13 - 12 = 12