Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 1 - Problem Solving and Critical Thinking - 1.3 Problem Solving - Exercise Set 1.3 - Page 41: 63

Answer

Friday

Work Step by Step

Days on which first person lies = Friday, Saturday, Sunday Days on which second person lies = Tuesday, Wednesday, Thursday So, today is Friday, because if first person says that I lied yesterday which means Thursday, the day on which he doesn't lie, but its Friday so he can lie about yesterday which is correct. Similarly, second person says truth on Friday, so if he says that I lied yesterday, means he is saying the truth today and lied yesterday which is Thursday, which is correct. So, today is Friday.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.

GradeSaver will pay $15 for your literature essays
GradeSaver will pay $25 for your college application essays
GradeSaver will pay $50 for your graduate school essays – Law, Business, or Medical
GradeSaver will pay $10 for your Community Note contributions
GradeSaver will pay $500 for your Textbook Answer contributions