There cannot be such a family because of self-reference. It is similar to the Russell paradox (named after Bertrand Russell).
As soon as you have a fact family with only two facts, you have added a third fact. The third fact is that is that the fact family had only two facts. That then makes it a family with three facts. Which means it is no longer a fact family with only two facts. So the third fact is no longer correct. And so it does not have three facts. Which means it has only two facts and you will keep looping round and round forever!
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because they use the same numbers
fact family are related facts Number family are related numbers
6X7=43 43/6=7
Becauseit cant divide into that number
If a fact family has only 2 multiplication nd division sentences, what do you know about the product and divident?