DAY 465

MATH MAGIC

Add the year of your birth + the year of birth of your child (or any younger relative). Now add to this your age (the age you will be in the current year - even if you have not reached your birthday yet). Next add the age of your child or other relative - also the age he/she will be by Dec. 31 of the current year. What do you get?

Answer:

A number exactly double the current year.

For example:
Today is Sept. 26, 2019.
I was born in 1945.
My daughter was born in 1976.
I will be 74 this year (in Oct.)
My daughter is 43 (already had her birthday).

1945 + 1976 = 3921
74 + 43 = 117
3921 + 117 = 4038  (2x2019)