Mr. Smith had 4 daughters. Each daughter had 4 brothers. How many kids does Mr. Smith have?
Mr. Smith has a total of 8 kids, in explaining, each daughter has a total of 4 brothers which are the same brothers, thus the 4 daughters +4 brothers = a total of eight people. Each daughter can claim to have 4 brothers of hers as well as the other one thus they are eight in total.