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Pick A Number

.
Pick a number between 2 and 9
Example : 7

Multiply this number by 2
Example :  7 x 2 = 14
 
Add 5
Example : 14 + 5 = 19

Multiply this number by 50
Example : 19 x 50 = 950

If you already had your birthday this year, add 1761
Example : 950 + 1761 = 2711

If you have not yet celebrated your birthday this year, add 1760.
Example : 950 + 1760 = 2710

Subtract your year of birth
Example : 2711 - 1987 = 724
 
Magic:
The first number is the number you picked and the last two numbers are your age.



Math Tricks