The factor strings for 12 is 6*2 , 2*2*3, 4*3 if you are doing a chart than you put the length is how long the problem.
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4*2*2 is one
2 x 2 x 13
12 is the only two digit number which is a factor of 12.
2 x 6 = 12 2 and 12 are factors of 12 2 and 6 are a factor pair of 12
12 is both a multiple of 6 and a factor of 36.