Note: If you were logged in, the site would keep track of how many Easter Eggs you have found. The Telephone GameYou can impress your friends with this calculator game; you can impress them even more if you can explain to them how it works!Quote Grab a calculator. Type in the first three numbers of your seven digit telephone number. Multiply by 80 Add one Multiply by 250 Add the last four digits of your number Add them again Subtract 250 Divide by 2 What is the final number? The result, of course, is your telephone number. Seems bizarre? Not really. If you know some algebra, keep reading to find out why it works! Let X be your first three digits, and Y be your last four digits. Then the steps are as follows: Begin with X Multiply by 80 --> 80X Add one --> 80X + 1 Multiply by 250 --> 20000X + 250 Add Y (twice) --> 20000X + 250 + 2Y Subtract 250 --> 20000X + 2Y Divide by 2 --> 10000X + Y Which, of course, is your telephone number. Note: I originally posted this information here: Telephone # Game This is one of 13 Easter Egg pages on The Problem Site. Can you find the others?
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