Question 9
A father says to his friend, “That’s one of my sons sitting over there.” His friend asks the father, who is a mathematician, how many kids he has. The father replies, “My son has as many sisters as he has brothers. Each of his sisters has twice as many brothers as she has sisters.” How many sons and daughters does the mathematician have?
Input note: write both counts, for example “s sons and d daughters”, replacing s and d with your numbers.
Input note: write both counts, for example “s sons and d daughters”, replacing s and d with your numbers.