This document outlines a 4 step process to guess a friend's birth date based on multiplying and adding numbers related to their date of birth. The friend is asked to perform a series of mathematical operations starting with multiplying their birth date by 5. Subsequent results are summed with additional numbers and multiplied together. The final result is shared and subtracting 165 will reveal the original birth date and month. An example is provided that correctly identifies a birth date of July 10th through this process.

2. The steps
are
You can guess
the birth date
of a your friend

3. The first,
ask him to multiply his
date of birth to 5

4. Second,
the result summed with 6,
then multiplied with 4.

5. Third,
the result summed with 9
then multiplied with 5.

6. and then the result
summed with month of
birth January = 1
February = 2
March = 3
April = 4
May = 5
June = 6
July = 7
August = 8
September = 9
October = 10
November = 11
December = 12

7. The last,
ask him to mention the end result.
then the result reduce with 165.
the result is the first of two-digit
date of birth and month of birth
followed.

8. Example:
A your friend to determine the 10th July
1. 10 X 5 = 50
2. 50 + 6 = 56
3. 56 X 4 = 224
4. 224 + 9 = 233
5. 233 X 5 = 1165
6. 1165 + 7 = 1172
And then the final result is given to you.
So you calculate 1172 - 165 = 1007, these
results indicate that he was born the 10th
July.