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12 has 3 factor pairs and the pairs are (1,12), (2,6) and (3,4).
It has 6 possible pairs of sides, although all the pairs will look the same. It has 6 possible pairs of angles, although all the pairs will look the same.
There are infinitely many pairs. For example 23.5 and 75.5 or -3 and 102.
How many different outfits are possible from six shirts, four pairs of pants, and five pairs of socks?