I will guess your birthday (using a math trick) #2

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Let me to try to explain how it works with a specific example. I am going to use the month as 8 and the day as 12 and go through the steps, but not perform all the arithmetic. 5 × 8/ 5 × 8 + 17/ 2(5 × 8 + 17) = 10 x 8 + 34/ 10 × 8 + 34 - 13 = 10 × 8 + 21/ 5(10 × 8 + 21) = 50 × 8 + 105/ 50 × 8 + 105 - 8 = 50 × 8 + 97/ 2(50 × 8 + 97) = 100 × 8 + 194/ 100 × 8 + 194 + 9 = 100 × 8 + 203/ 100 × 8 + 203 + 12/ 100 × 8 + 203 + 12 - 203 = 100 x 8 + 12/ Now see what you have. There is the number of the month (it is 8 here but it could be any month) followed by two zeros, plus the number of the day (12). So for this example I get 800 + 12 = 812.

This is the second version of (using a math trick)! I would like to thank @Jay_son for the steps and how it works, credits on him. Use a calculator for this one and the calculator will just guess your age!

Created by: Cutie_Shy
  1. What is your age?
  2. What is your gender?
  1. Multiply the number of the month in which you were born by 5
  2. Add 17
  3. Double the answer
  4. Subtract 13
  5. Multiply by 5
  6. Subtract 8
  7. Double the answer
  8. Add 9
  9. Add the number of the day on which you were born
  10. Subtract 203

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Quiz topic: I will guess my birthday (using a math trick) #2