You may have heard of this maths trick before but still, it is kind of cool. That's because the six-step sum is able to come up with your age and shoe size. First off, you start with writing down your shoe size. You then have to multiply the figure by 5 and add 50. You then multiply that number by 20 and add 1015, before subtracting the year that you were born. This should leave you with a figure that includes both you age and shoe size, as long as you haven't already had your birthday. If you have, the figures don't work, which is probably why it surfaces around this time every year. via GIPHY