How To Find Someone's Birthday Using Math. Multiply by the month of your birth (eg, if your birthday was 29 february, you'd multiply by 2) subtract 1. 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.
Multiply this number by 2 3. Ali (respectfully!) to state his birthday in the natural order: First of all, pick the number of times a week that you would like to go out to eat (more than zero but less than 10).
So now, the instructions become :
Use these few simple steps to determine someone's age. No, it's not some modern sorcery — just a fun math trick that can figure out your age and your shoe size in six simple steps. The oxford dictionary defines “age” as the length of time that a person has lived or a thing has existed. First of all, pick the number of times a week that you would like to go out to eat (more than zero but less than 10).