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Secret Codes

Your friend thinks of an important date in his life and then works a few problems on a calculator. When he finishes you enter a magical secret code and his date suddenly appears on the display!

Ask a friend to think of an important date in his life, and hand over him a calculator and tell him to:

  1. Enter the number of the month without letting you see it. (eg. September=9)
  2. Multiply the number by 5
  3. Add 6 to that total
  4. Multiply that number by 4
  5. Add 9 to that number
  6. Multiply that answer by 5
  7. Add the date
  8. Subtract 165

Now ask him to tell you the final result. The last two digits will be the date and the first digit will be the month.

Eg. If the answer is 901 then the month is September and the date is1
       If the answer is 1025 then the month is October and the date is 5

Srinivas K.


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