Two Sisters, Alternating Lying Days
Ada lies on Mondays, Wednesdays and Fridays and tells the truth on all other days. Bo lies on Tuesdays, Thursdays and Saturdays and tells the truth on all other days. On a certain day Ada says, "I lied yesterday," and Bo says, "Ada will lie tomorrow." What day of the week was it? Answer with the weekday.
Related problems & prerequisites
Worth solving first
- The Weekday Liar 7.0/10
- Who Broke the Vase 7.0/10
- Five Islanders and Their Conditionals 7.0/10
Source: Original puzzle in the tradition of Lewis Carroll's Lion and Unicorn weekday puzzles. Statement written for AxiomIQ.