Posted by BRENDON on Thursday, September 17, 2009 at 6:28pm.
Let D=number of daughters in the family.
Number of sons = D+1
We also know that D>1 by virtue of the sentence:"The daughters, incidentally, are all older than the sons."
So the total number of offsprings in the Logan family is D+D+1=2D+1 where D≥2.
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