Where Must Dracula Be - Can you solve it?

113. Where Must Dracula Be

Exactly one casket holds Dracula.
There are three caskets: one red, one yellow, and one blue.
Each casket bears an inscription:
Red: "Dracula is in this casket."
Yellow: "Dracula is not in this casket."
Blue: "Dracula is not in the red casket."
At most one of these inscriptions is true.

In which casket is Dracula?

Submitted by Logic_Newbie · Added 23 January 2013 · Updated 8 August 2026

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Solution:

Assume Dracula is in the red casket.
The red inscription is true.
The yellow inscription ("Dracula is not in this casket") is also true because Dracula is in red, not yellow.
That makes two true inscriptions, violating the rule. So Dracula is not in the red casket.

Assume Dracula is in the blue casket.
The red inscription is false.
The yellow inscription is true, and the blue inscription ("Dracula is not in the red casket") is also true.
Again there are two true inscriptions, which is impossible.

The only remaining possibility is that Dracula is in the yellow casket.
Here the red inscription is false, the yellow inscription is false, and the blue inscription is true—exactly one true statement, satisfying the condition.

Therefore, Dracula must be in the yellow casket.

Comments (8)

MathMad ★ Solved 26 January 2013

Yellow.

If at most one inscription is true, then either:
1. There are no TRUE statements
2. There is exactly one TRUE statement.

Inscription on the red and blue cannot be both true or both false, since one is negation of the other. ==> There is exactly one TRUE statement.

So either the inscription on the Red or Blue is true ==> Inscription on the Yellow one is false.

==> The dracula must be in Yellow.

Inscription on Red is FALSE;
Inscription on Yellow is FALSE
Inscription on Blue is TRUE

bedead 27 January 2013

Yellow

AMD 29 May 2013

Basically, Dracula can only be in the blue one.

Shipra 26 November 2013

If we consider each statement true one by one, then only possible case with the given condition that is valid will be the one when the third incription is true.... Thus, the dracula is in the Yellow casket

lauramay 28 December 2013

RED

merlewood 8 June 2015

The Count is in the Yellow casket

forourke 24 November 2015

He is in the Red casket which is inside the yellow casket which is in the blue casket.

Shavil Maharaj 31 May 2018

yellow

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