Tomorrow,I will lie

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James and Jonathan are liars, who lie on specific days.

James lies on Fridays, Saturdays and Sundays, but he is honest on all other days.

Jonathan lies on Tuesdays, Wednesdays and Thursdays, but he tells the truth on all other days.

On what day of the week would they both say “Tomorrow, I will lie.”?

A. Monday B.Tuesday C.Wednesday D. Thursday

wednesday None of these Thrusday Tuesday Monday

Pintu Raj by Pintu Raj , 26, India

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2 solutions

Chad Cuzzort
Apr 26, 2015

Well seeing one is lying on Friday, Saturday, and Sunday and the other will lie on Tuesday Wednesday and Thursday with Friday being the shift change for both of them. Thursday when the say tomorrow, I will lie, one is being honest while the other is actually lying.

1 Helpful 0 Interesting 0 Brilliant 0 Confused

well I agree with you too Chand. Thanks for your solution

Pintu Raj - 6 years, 1 month ago
Pintu Raj
Apr 16, 2015

Answer is Thursday! Lets say if the person is speaking truth then he must be lie on next day, but if he is lying while saying “Tomorrow i will lie” then he will speak truth on next day.

So they can say the statement only when they change their behavior on next day.

Lets prepare a table for James and Jonathan for all days

From above table

James can say the statement on Thursday and Sunday

and Jonathan can say it on Monday and Thursday.

As both of them say the statement on same day, so it must be Thursday only.

0 Helpful 0 Interesting 0 Brilliant 0 Confused

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