All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars
 perplexus dot info

 Magic Rods (Posted on 2003-11-11)
You need to make a set of five rods for a magic trick, with numbers on them ranging from 1 to 31 inclusive. Then you ask people to pick a number and show you only the top number of whatever rods it is on. From that you have to guess which number the person picked. This has to be done within a few seconds and isn't a matter of remembering what numbers are on them.

What numbers should be on each of the five rods?

 See The Solution Submitted by Lewis Rating: 4.0000 (7 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
 My solution | Comment 12 of 13 |
With 5 rods you can represent 0 - 31 different numbers. Break each number down in to it's binary equivalent and on those rods write down the number. At the top of each rod, write the number 1 - 5 representing the least to most significant bits.

For example, take the number 19. In binary

10011

So, 19 would be written on the first, second and fifth rod.
 Posted by David Hanna on 2003-12-03 20:59:41

 Search: Search body:
Forums (4)