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May 14th, 2018, 06:52 PM  #1 
Newbie Joined: May 2018 From: Ny Posts: 1 Thanks: 0  Does this word problem have a mathematical equation
If Theresa's daughter is my daughter's mother, what am I to Theresa? A.grandmother B.mother C.daughter D.granddaughter. I'm needing an equation to solve this. Is there such an equation? Grateful for your help! Jamie Lee 
May 14th, 2018, 07:13 PM  #2 
Senior Member Joined: Sep 2015 From: USA Posts: 2,009 Thanks: 1042 
This isn't possible as stated using the usual definitions. Teresa's daughter is my daughter's mother. Therefore I had a daughter with Teresa's daughter. Therefore, unless some sort of artificial insemination is going on and there is an unknown father, I am the father of Teresa's daughter's daughter. Thus I am male. All the choices given are females. What I am to Teresa is her son in law. 
May 15th, 2018, 06:56 AM  #3  
Senior Member Joined: May 2016 From: USA Posts: 1,048 Thanks: 430  Quote:
If Theresa is the mother of Sally who is the mother of Roberta and "I" am Sally, then Sally can truthfully say "I, Sally, am Theresa's daughter, and Roberta is my daughter. In other words, Theresa is my mother." EDIT: Another way to think this through is to say that if I have a daughter then I am either a father or a mother. And my daughter's mother is is the daughter of Theresa. So if I am a mother, then Theresa is my mother. If I am a father, then Theresa is my motherinlaw, but that choice is not available so I am not a father. STUPID PROBLEM Last edited by JeffM1; May 15th, 2018 at 07:43 AM. Reason: Fixed typo and added supplemental material  
May 15th, 2018, 08:49 AM  #4 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 12,756 Thanks: 860 
C'mon c'mon...there IS a solution: "none of the above"!


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