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pdurrant · 06-07-2013, 04:36 AM

I must have been tired last night - I completely mis-read Bilbo's comment. Oh well.

Hmm... A quiz question. OK, another from Richard Wiseman.

I blindfold you, and give you a pack of cards. I tell you that ten of the cards in the pack are face-up, and the rest are face-down. I ask you to use the whole deck to make two piles of cards, and each pile must contain the same number of face-up cards.

How do you do it?

(No, the cards aren't marked, and you can't feel the difference between a face-up and face-down card by touch.)

06-07-2013, 04:36 AM	#11850
pdurrant The Grand Mouse 高貴的老鼠 Posts: 71,506 Karma: 306214458 Join Date: Jul 2007 Location: Norfolk, England Device: Kindle Voyage	I must have been tired last night - I completely mis-read Bilbo's comment. Oh well. Hmm... A quiz question. OK, another from Richard Wiseman. I blindfold you, and give you a pack of cards. I tell you that ten of the cards in the pack are face-up, and the rest are face-down. I ask you to use the whole deck to make two piles of cards, and each pile must contain the same number of face-up cards. How do you do it? (No, the cards aren't marked, and you can't feel the difference between a face-up and face-down card by touch.) Last edited by pdurrant; 06-07-2013 at 03:56 PM.