Lancecorner

I just learned a new trick on how to guess your birthday. It’s fun and interesting. You can share this trick to your friends and other group of people. You just ask the person to think of his or her birthday and you are going to guess the day. I learned this through lifesmith website. Here is how to do it.

1. Ask the person to take the number of month to his/her birthday.

For example:
January – 1

February – 2 and soon…

2. Multiply that month number by 5
3. Add 6
4. After that, multiply the total by 4
5. Add 9 to it
6. Once again, multiply the total by 5
7. Lastly, have them add to that total the day when he or she was born on.

Ask that person to give you the over all total. Then, subtract 165 in your mind and you will get the month and day when that person was born on.

The expression of the calculation goes like this:
Let A = number of month

B = number of day

5 ( 4 (5A + 6) + 9) + B = 100 A + B + 165

So, if you minus 165, the remaining will be the month in hundreds plus the day. Fun isn’t?