A puzzle from our friends at Futility Closet:
Five children — Ivan, Sylvia, Ernie, Dennis, and Linda — entered a candy store, and one of them stole a box of candy from the shelf. Afterward each child made three statements:
1. I didn’t take the box of candy.
2. I have never stolen anything.
3. Dennis did it.
4. I didn’t take the box of candy.
5. I’m rich and I can buy my own candy.
6. Linda knows who the crook is.
7. I didn’t take the box of candy.
8. I didn’t know Linda until this year.
9. Dennis did it.
10. I didn’t take the box of candy.
11. Linda did it.
12. Ivan is lying when he says I stole the candy.
13. I didn’t take the box of candy.
14. Sylvia is guilty.
15. Ernie can vouch for me, because he has known me since I was a baby eight years ago.
If each child made two true and one false statement, who stole the candy?
A problem by Wayne M. Delia and Bernadette D. Barnes:
Click here for answer.
Take a look at the sequence. What number comes next? The answer is a no brainer – once you know the answer, that is. Neil Sloane, founder of the Online Encyclopedia of Integer Sequences, starts explaining the answer at :22, so pause before then if you need more time to figure it out. Extra footage […]
From our friends at Futility Closet: Here are a penny and a quarter. Make a statement. If your statement is true, then I’ll give you one of these coins (not saying which). But if your statement is false, then I won’t give you either coin. Raymond Smullyan says, “There is a statement you can make […]
Created by esteemed riddler Edwin F. Meyer, co-author of The Gedanken Institute Book of Puzzles. (TED-Ed)
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