If you are having difficulty solving any of the Daily Challenges or winning deals, you can use a 'show me how to win' feature.

To access the show me how to win feature for daily challenges, tap the gold crown icon while playing the challenge. This will bring you to the Calendar Selection page.

Then tap the gold graph icon on the top right of the Calendar. This will bring you to the leaderboard page.

The Show me how to win button should be at the bottom.

If you don't see these options available, then you are likely playing a random deal which will not have this option.