Write down your shoe size, to the nearest whole number. 11
Add 50 61
multiply by 20 1220
add 1000 2220
add 21 2241
take away your birth year 242
the first 2 digits are your shoe size, the last 2 are your age. 24 and 42
My size is 11 and my age is 22 :_: (off by basically a factor of 2)