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This trick is similar to the Two Digit Reversal. Your friends might need to have a pencil and paper handy, though.

**Pick any four-digit number.**For example, 2469.**Reverse the digits.**For example, 9642.**Add your original number.**For example, 9642 + 2469 = 12111.**If your total is 4 digits, prepend a 0.**For example, 1234 becomes 01234, and 9876 becomes 09876.**Enter the first four digits in the space below.**For example, if your number is 06571, enter 0657.