Riddle #255

Question: If you have a cake, how many pieces of cake can you form with 3 straight cuts?

Riddle Discussion

By: MrMan on 27/7/14

No, the answer 8 is wrong. If you cut the cake in 4 pieces, you got something like an X (or an O with an X over it). But you can´t cut all of these four pieces in half with only one cut. You can slice three of them by cutting a horizontally above the middle, but you can´t cut all four.\n\nIf you want a formula for this problem it is (1+2+3+...+n)+1 for n-lines.\nFor example with three lines: (3+2+1)+1=7 (not eight).\nOr with four lines: (4+3+2+1)+1=11. \nYou can try this if you draw your cake (or you bake one :-) ) and try to cut eight pieces, but it won´t work.

By: MrMan on 27/7/14

If you have a cake,

By: angelakazel on 4/1/14

this makes no sense to me, even how they explained it, there would still be 6 pieces, right?\n

By: gandalf on 4/1/14

No, if you cut it into four pieces. Then cut it horizontally (cutting each of these 4 pieces into 2 pieces), then 4 * 2 = 8 pieces. The final cut isn't conventional but still follows the rules.

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Riddle #3081 (medium)

Question: It is Halloween and your friends dare you to go into a haunted house. You creep up to the door, a little scared wondering what is behind the door. You go in and there is a long hallway leading out into a dark musty room with three doors. You're kind of scared once you are inside. You try to turn back, to get back outside, but when you turn around the door is closed and locked. You yell for help but there is only silence. The room is dark and you look for a light source. You see a light switch and try to turn it on. Sadly the power is out. You are terrified but have no choice but to follow the long hallway to the three doors in the pitch black. Behind one door is a bottomless pit with no end. Behind another door is an electric chair which you must sit in. Behind the last door is a pool full of acid. You must go in one of the rooms to the danger. Which one should you go through?