Guess Your Telephone Number Math Game

This math game ONLY works with the format of US Telephone Numbers!

In order to play this math game, you need to:

✅ Use a calculator that can display numbers as large as 99,999,999,999.

✅ If you are using your Smartphone calculator, turn your device to LANDSCAPE MODE so that it can display the large numbers.

Think of a Telephone Number and remember the area code, first 3 numbers and last 4 numbers!

Complete the arithmetic steps shown below.

Step 1
✅ Multiply the 3 DIGIT AREA CODE of your telephone number by 40.
Step 2
✅ Multiply the results by 25.
Step 3
✅ Add the FIRST 3 DIGITS of your telephone number.
Step 4
✅ Multiply the results by 50.
Step 5
✅ Add 1 to the results.
Step 6
✅ Multiply the results by 400.
Step 7
✅ Add the LAST 4 DIGITS of your telephone number.
Step 8
✅ Add the LAST 4 DIGITS of your telephone number AGAIN.
Step 9
✅ Divide the results by 2.
Step 10
✅ Subtract 200 from the results.

👍 If you completed all of the arithmetic steps correctly, your calculator is showing your telephone number!