Portal:Mathematics/Fun corner

===Phone number birthday puzzle

YOUR PHONE NUMBER WILL REVEAL YOUR AGE

Your Phone number will reveal your actual Age. It will take about 15 seconds,read and do it at the same time so that you will not lose the fun.

1. Take a look at your last digit of your cell phone number
2. Use this figure and multiply by 2
3. Then add 5
4. And then multiply by 50
5. And then add the number 1765
6. The last step; with this number, subtract your birth year.

Now you see a three-digit number. The first digit is the last digit of your phone number, the next two digits are your actual age! You can use the attached spreadsheet to solve this and find out why it works!!