Chocolate Test

Test Your Age Using Chocolate Maths

It won't take long

1) First of all, pick the number of times a week that you would like to have chocolate. More than once but less than 10 times.

2) Multiply this number by 2.

3) Add 5.

4) Multiply it by 50 -- I'll wait while you get the calculator
(Click Start button, run, calc.)

5) If you have already had your birthday this year add 1755 ....

If you haven't had a birthday, add 1754.

6) Now subtract the four digit year that you were born.

You should have a three digit number.

The first digit of this was your original number.  This is the number of  times you want to have chocolate each week).

The next two numbers are:

YOUR AGE! (Oh YES, it is!!!!!)

This is the only year (2005) it will ever work

Guy's Worked Example - Where you choose 2 Chocolates a day

1)  Two chocolates a day = 2

2)  2 x 2 = 4

3)  4 + 5 = 9

4)  9 x 50 = 450

5)  450 + 1755 = 2205

6)  2205 - yyyy where yyyy = Year you were born.

6a)  2205 - 1949 = 256

7)  2 (in 256) = Two Chocolate a day choice

7a)  56 (in 256) = Age if born in 1949.

Why does it work?

Divide the task into two parts, a) calculate the number of chocolates per day.  b) Work out your age

Part a) The number of chocolates per day

Multiply by 2 and later multiply by 50 means multiplying by a total of 100.  When the smoke clears:

1 x 100 = 100  (one choc)

2 x 100 = 200  so the first digit will tell the number of chocolates per day that you chose.

Part b)  Your age

The tricky part of the calculation comes from the relationship between 1755 and 2005, this is exactly 250.  Do you remember adding 5? Well refer back to point 3) and ).  Observe that 5 x 50 = 250.  Another way of looking at the figures is:
1755 + (5 x 50) = 2005

In the answer you have 2005 + a number of hundreds depending on your choice of chocolates per day.  2205, 2305, 2405.  Now, if you focus just on (2005 - yyyy) then I hope that understand why you get your age.

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