Thought this was quite good sat down and worked it out myself but i will share with you
Pick a nos between 1-10 i.e.2-9
next multiply by 2 .add 5 multiply by 50 if you have had your birth day this year add 1759 if not add 1758.
now subtract the four digit year you were born you should end up with a three digit number the first digit was the number you started with and the other two is your age if not you done it wrong.
