Brain Teasers
Lazy Daughter
A wealthy wise old woman feared that her daughter was lazy and, as a result, rather stupid. When the old woman died, her will stipulated that her assets were to be liquidated and a check was to be written for the full amount. The check was to be placed in one of three envelopes. The other two envelopes would contain a blank piece of paper. If the daughter could determine from the writing on the envelope which envelope contained the check, she would inherit her mother's fortune. Otherwise, the fortune would go to the old woman's favorite charity for animals. The daughter was not allowed to touch the envelopes. Her decision had to be made based on the writing on the envelopes. The daughter was told that only one envelope had a true statement and that the other two statements were false.
The envelopes had the following writing:
1. This envelope does not have the check.
2. This envelope has the check.
3. The second envelope does not have the check.
Which envelope should the daughter pick?
The envelopes had the following writing:
1. This envelope does not have the check.
2. This envelope has the check.
3. The second envelope does not have the check.
Which envelope should the daughter pick?
Answer
The daughter should pick envelope 1. Statements 1 and 2 were false, and the only true statement was statement 3.If the check was in envelope 1, that would make statement 1 false, statement 2 false and statement 3 is the only true statement.
If the check was in envelope 2, statements 1 and 2 would both be true.
If the check was in envelope 3, statements 1 and 3 would both be true.
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Comments
i never would have thought of that. great thinking!
I found this one to be the easiest to solve, very thought out and enjoyable, too.
my logic was slightly different.
statements (2) and (3) contradict eachother. one must be true and the other must be false, eating up the true answer. therefore statement (1) is false making it the envelope
statements (2) and (3) contradict eachother. one must be true and the other must be false, eating up the true answer. therefore statement (1) is false making it the envelope
Very Nice Teaser. I enjoyed this one, was fun, not to easy and not very hard either. Good Job
She should pick envelope 3 so the money goes to charity! We wouldn't want to encourage selfishness, would we?
I got the right answer, but your logic doesn't make sense to me. Maybe its just me.
easy but fun
i got the answer.it was fun
I really like this one because it wasn't too hard, but you would think that the money is in envelope 3 because it is true, but you have to complete the next step and follow the directions on the envelope to get the money.
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