1. Click & drag a blue circle over any number 1 through 16.
2. Click & drag another blue circle over any other number that has not been struck through with a red line.
3. Click & drag another blue circle over another number not yet struck through with a red line.
4. This leaves one number that has not been struck through with a red line. Click & drag the last blue circle over the remaining number.
5. Add together the blue circled numbers. Yes! The total will always be 34!
