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Counting by 3's !
  Click on this sign to display the box. Enter the number in the box.
Click this button Answer Buttonwhen you're done. If you're answer is correct then the box will disappear and the number will appear in place of the button. If you have entered the wrong answer, you will be alerted and the box will remain in place.
Click the Finish button when          you are all done!
 
GREAT JOB