Problem: A 'gnomon' is a pointer on which device?
Answer: sundial

Problem: Which George Gershwin opera is adapted from a novel by DuBose Heyward?
Answer: porgy and bess

Problem: What is an abacus-like finger counting method used to perform basic mathematical operations, by which it is possible to display all numbers from 0 to 99 with both hands?
Answer: chisanbop

Problem: Zeus is the king of the Gods in which mythology?
Answer:
greek