Try This Simple Maths Trick On Your Friends And Surprise Them By Revealing Their Shoe Size And Age

First ask your friend to think of their shoe size, then – using a calculator or a pen and paper – they should multiply it by five.

Next they add 50, and then take that total and multiply it by 20. They should add 1,015, and finally subtract the year of their birth.

Magically, the result should be their shoe size and age, together making up a three or four-digit number. The trick works regardless of whether you use UK, European or American shoe measurements.

However, it won’t work for someone who has already had their birthday this year, or who is more than 100 years old.

NOTE: at the start of next year, the trick will only work if you add 1,016.

HOW YOU CAN DO THE TRICK

Ask your friend to write down their shoe size – but not tell you.
They multiply that number by fiveNext add 50.
Now multiply that number by 20
Add 1,015.
Finally, subtract the year they were born.

The best way of explaining it is by looking at how it reached the shoe size and the age separately. The formula is able to work out someone’s age because it subtracts their year of birth from the number 2,015.

The way it creates 2,015 is the step which adds 1,015 to 50 multiplied by 20, or in other words, 1,015 plus 1,000. Your shoe size is correctly identified because the step that multiplies it by five, and then by 20, simply adds two zeroes on to the end of the original shoe size. For example if your shoe size is 11, it will work out as 1,100. The final step of the equation adds that number to your age so the first two numbers are your shoe size.

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Replies

Roaring Lovely January 22, 2016 at 5:35am

Can someone show me what is wrong with the following calculation:

The question is solve the equation:

x^2+x-2=x^2-x

Then x^2 simply cancel and we get the answer x=1

but then we can rewrite the equation as:

(x+2)(x-1)=x(x-1)

dividing through by (x-1), we get x+2=x. We get 2=0
Roaring Lovely January 22, 2016 at 5:20am

Here is another one:
i)Take the last diggit of your phone number.
ii)Multiply it by 9
iii)Add the digits of the number you got
iv)Add 4

Unless your phone number ends with 0, you must get 13
Roaring Lovely January 22, 2016 at 5:05am

When I was still in facebook, some guy posted this to me. I had to scratch my head for a while but eventually I deviced mine too and then I sent it to the guy. The guy who wrote that one was careless to use 1015 as it makes the trick easy to see. Try this one:

i)Take the last digit of your phone number and multiply it by 2
ii)Add 27
iii)Multiply the result by 50
iii)Add 666
iv)Substract the year of your birth

The first diggit must be your phone number and the last two digits must be your age
Krishna Kalki January 22, 2016 at 12:32am

its fun