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The sum of the ages of Ruth and her mother is 77 years. 
20191106 

From Lydia: The sum of the ages of Ruth and her mother is 77 years. The difference in their ages is 27 years. How old is each? Answered by Penny Nom. 





How many handshakes take place? 
20080626 

From Peter: Eight people of different heights are at a party. Each person decides to only shake hands with people shorter than him/herself. How many handshakes take place?
My math book says it is 0. Is it wrong? If so, what is the answer? Answered by Harley Weston. 


