Super Calculator Brain Adapted by Doc Yoder / Inventor is unknown
Materials: Calculator, pencil, paper
The subject gives you two three digit numbers. You supply a third three digit number. While you make it appear to be a random number, the number you supply corresponds to the second number so that the digits of the third number added to the digits of the second number equal 999.
Give the subject a calculator.
Tell the subject to enter the numbers in the following manner:
multiply the first number by the second number followed by a plus sign and then multiply first number by the third number followed by the equals sign (=)
The subject should not tell you the answer.
Example:
259 is first number
395 is the second number
604 is the third number which you supply (Note that 395+604 equals 999.)
259 X 395 + 259 + 604 = The answer to this example is 258,741.
To quickly and secretly get the answer, you simply subtract one from the first number (in this example the first number is 259), write it down (258), and then write the three numerals that would add to the digits of the number that you just wrote down to make three nines.
258,7 4 1
(2+7=9, 5+4=9, and 8+1=9)
You have some choices on how you reveal the answer.
You might make it seem that you are reading their mind as they think of the answer. The first digit is a number with a curve in it. It is a low number. It is a 2. The second number is a middle number. It is a 5. ,,,
You might say you are a mathemagician and you can get the answer as fast as they can type it into the calculator! It all depends on your performing style and your personality.