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.