Computer Numbers
Effect: The magician shows six papers with computer numbers printed on them. A volunteer thinks of a number from 1 to 63. The magician asks the volunteer to look at each paper and to answer "Yes" or "No" if they see their number on each paper. The magician can immediately tell the person what number they were thinking of!
Secret: The six papers have random numbers on them from 1 to 63. It doesn’t matter which number the volunteer thinks of. All the magician has to do is add the first number of all the "Yes" papers.
Example: Let’s pretend the volunteer is thinking of the number 12. Show the first paper and ask, "Is your number on this paper?" If he answers "Yes" remember the first number on that paper. Show the second paper and ask, "Is your number on this paper?" If he answers "Yes" add the first number on this paper with the first number on the previous paper. Show the third paper and ask, "Is your number on this paper?" If he answers "No" don’t do anything (but keep remembering the total of the two previous numbers). Show the fourth, fifth and sixth paper...if they say "Yes" to any of those, keep adding the first numbers of each of the "Yes" papers. If they say "No" to any of those, don’t do anything (but keep remembering the total of all the previous numbers).
The adding of all the first numbers of the "Yes" papers will add up to the number the person is thinking of!
Note: Have an adult cut each box of numbers so you have six separate pieces of papers with random numbers on them.
Also, look for the two papers with the largest first numbers (that would be 32 and 16). I’ve already memorized that 32 + 16 = 48. That way, when you do those two first, and if they say "Yes" to those two, you already know that (so far) the number you’ll be remembering is 48. After that, it’s easy to add the next "Yes" numbers in your head since they’re small numbers.

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