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 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.)
 Why so complicated? | Comment 10 of 13 |
If the top number of each rod is the following
A-1 B-2 C-4 D-8 E-16 then the solution would be the following:
A 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31
B 2 3 6 7 10 11 14 15 18 19 22 23 26 27 30 31
C 4 5 6 7 12 13 14 15 20 21 22 23 28 29 30 31
D 8 9 10 11 12 13 14 15 24 25 26 27 28 29 30 31
E 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

If a someone picks the number 27 then they would show A B D E and you would see 16 8 2 1 and you just add 16+8+2+1=27 and you say 27.
 Posted by Nelson on 2003-11-12 03:22:57
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